Word Formation & Derivatives
Prefixes, suffixes, compounds, inflections, and derived word families.
11746 words
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Some words in this topic are A2–C2 — part of Pro. A1 words are always free.
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insurgent
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/ɪnˈsɜrdʒənt/
a person who rises in revolt against authority; rebellious
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integer
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/ˈɪntɪdʒər/
a whole number, positive, negative, or zero
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intensification
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/ɪnˌtɛnsɪfɪˈkeɪʃən/
the act or process of making or becoming more intense
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intension
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/ɪnˈtɛnʃən/
the internal content or connotation of a concept; intensity of effort
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interment
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/ɪnˈtɜrmənt/
the burial of a corpse in a grave or tomb
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interminable
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/ɪnˈtɜrmɪnəbəl/
endless or seemingly without limit, especially tediously so
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intermittently
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/ˌɪntərˈmɪtəntli/
at irregular intervals; occasionally and not continuously
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interpenetrate
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/ˌɪntərˈpɛnɪˌtreɪt/
to penetrate one another thoroughly; to pervade mutually
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interpretive
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/ɪnˈtɜrprɪtɪv/
serving to explain or render the meaning of something
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interrogator
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/ɪnˈtɛrəˌɡeɪtər/
a person who questions someone closely, often in an official inquiry
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intricacy
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/ˈɪntrɪkəsi/
the quality of being complex; a complicated detail
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intrinsicality
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/ɪnˌtrɪnsɪˈkælɪti/
the quality of being intrinsic or essential by nature
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intrusive
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/ɪnˈtrusɪv/
intruding or encroaching where not welcome; obtrusive
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inundation
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/ˌɪnənˈdeɪʃən/
a flood; an overwhelming abundance of something
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inventive
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/ɪnˈvɛntɪv/
having or showing creativity and originality in devising things
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inventory
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/ˈɪnvənˌtɔri/
a complete list of goods or items in stock; the stock itself
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investigative
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/ɪnˈvɛstɪˌɡeɪtɪv/
relating to detailed inquiry or systematic examination
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invigorate
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/ɪnˈvɪɡəˌreɪt/
to give strength, energy, or fresh vitality to
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involution
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/ˌɪnvəˈluʃən/
the quality of being intricate or entangled, or a complicated detail
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irresponsibility
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/ˌɪrɪˌspɑnsəˈbɪlɪti/
the quality of acting without proper care or accountability
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irriguous
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/ɪˈrɪɡjuəs/
well-watered; supplying or marked by irrigation (archaic, literary)
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irritant
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/ˈɪrɪtənt/
something that causes irritation or annoyance
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irritative
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/ˈɪrɪˌteɪtɪv/
tending to cause irritation or inflammation
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irruption
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/ɪˈrʌpʃən/
a sudden violent bursting in or invasion
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jeopardy
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/ˈdʒɛpərdi/
danger of loss, harm, or failure; legal risk of conviction
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jobless
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/ˈdʒɑbləs/
without paid employment; unemployed
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jogger
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/ˈdʒɑɡər/
a person who runs at a steady, gentle pace for exercise
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jointly
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/ˈdʒɔɪntli/
together with another or others; in a shared manner
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joker
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/ˈdʒoʊkər/
a person who jokes; a playing card outside the normal suits
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jolly
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/ˈdʒɑli/
cheerful and good-humored; (British) very or extremely
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jovial
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/ˈdʒoʊviəl/
cheerful and good-humored
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jubilant
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/ˈdʒubɪlənt/
feeling or expressing great joy and triumph
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jugglery
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/ˈdʒʌɡləri/
trickery or deception, especially by sleight of hand
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juryman
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/ˈdʒʊrimən/
a male member of a jury
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jurywoman
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/ˈdʒʊriˌwʊmən/
a female member of a jury
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kindred
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/ˈkɪndrəd/
one's family and relations; related or similar in nature
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knavery
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/ˈneɪvəri/
dishonest or deceitful behavior
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knowingness
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/ˈnoʊɪŋnəs/
the quality of seeming to know more than one reveals
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laborious
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/ləˈbɔriəs/
requiring much time and hard effort
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laconic
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/ləˈkɑnɪk/
using very few words; terse to the point of brusqueness
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laden
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/ˈleɪdən/
heavily loaded or weighed down
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latterly
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/ˈlætɚli/
recently; in the latter part of a period
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lavishness
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/ˈlævɪʃnəs/
the quality of being extravagantly abundant or generous
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lawfully
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/ˈlɔfəli/
in a manner permitted or recognized by law
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lawmaking
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/ˈlɔˌmeɪkɪŋ/
the process of enacting laws; legislation
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leaden
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/ˈlɛdən/
heavy, dull, or gray like lead
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leaving
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/ˈlivɪŋ/
the act of departing; (plural) remnants or leftovers
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lection
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/ˈlɛkʃən/
a passage read aloud in worship; a textual variant reading
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leman
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/ˈlɛmən/
a lover or sweetheart, especially an illicit one
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lengthiness
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/ˈlɛŋθinəs/
the quality of being unduly long or protracted
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lesion
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/ˈliʒən/
a region of damaged or abnormal tissue in the body
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lessee
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/lɛˈsi/
a person who holds property under a lease
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licentious
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/laɪˈsɛnʃəs/
lacking moral or sexual restraint
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lickerish
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/ˈlɪkərɪʃ/
greedy, lustful, or eager for sensual pleasure
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lieutenant
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/luˈtɛnənt/
a deputy or a junior commissioned military or police officer
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lightness
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/ˈlaɪtnəs/
the quality of having little weight, or of being bright or carefree
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liken
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/ˈlaɪkən/
to compare one thing to another as similar
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limber
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/ˈlɪmbɚ/
supple and flexible; to make oneself supple
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livable
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/ˈlɪvəbəl/
fit or comfortable to live in or with
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lodging
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/ˈlɑdʒɪŋ/
a temporary place to stay; rented accommodation
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lofty
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/ˈlɔfti/
of great height; noble in sentiment, or haughty
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lolly
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/ˈlɑli/
a piece of candy, especially on a stick; (British slang) money
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loser
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/ˈluzɚ/
a person who loses or who is regarded as a failure
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lowering
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/ˈlaʊərɪŋ/
dark and threatening, as of the sky; scowling
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lowly
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/ˈloʊli/
low in rank or status; humble
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luminous
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/ˈlumɪnəs/
giving off or full of light; radiant
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lunacy
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/ˈlunəsi/
foolish or reckless behavior; insanity
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lusterless
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/ˈlʌstɚləs/
lacking shine or brilliance; dull
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lustful
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/ˈlʌstfəl/
full of strong sexual desire
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luxuriousness
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/lʌɡˈʒʊriəsnəs/
the quality of being richly comfortable and sumptuous
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malediction
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/ˌmælɪˈdɪkʃən/
a curse or the utterance of a curse
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marketer
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/ˈmɑrkɪtɚ/
a person who promotes or sells products or services
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maternity
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/məˈtɜrnɪti/
the state of being a mother; motherhood
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mateship
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/ˈmeɪtʃɪp/
camaraderie and loyalty between friends, especially in Australian usage
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matey
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/ˈmeɪti/
friendly and sociable; (British) a familiar term of address
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mawkish
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/ˈmɔkɪʃ/
excessively sentimental in a feeble or sickly way
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mechanics
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/məˈkænɪks/
the science of motion and forces; the practical workings of something
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medicament
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/məˈdɪkəmənt/
a substance used in medical treatment; a medicine
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medicate
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/ˈmɛdɪˌkeɪt/
to treat with medicine or a drug
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memorious
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/məˈmɔriəs/
having an excellent memory; mindful or remembering
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mercilessness
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/ˈmɜrsɪləsnəs/
the quality of showing no mercy or compassion
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meridional
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/məˈrɪdiənəl/
of the south or a meridian; characteristic of southern peoples
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merrily
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/ˈmɛrɪli/
in a cheerful and lively manner
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metamorphize
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/ˌmɛtəˈmɔrfaɪz/
to transform or change in form; to metamorphose
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meteorologic
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/ˌmitiərəˈlɑdʒɪk/
relating to weather or the study of the atmosphere
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middleman
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/ˈmɪdəlˌmæn/
an intermediary who trades between producer and consumer
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midway
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/ˈmɪdˌweɪ/
halfway; the avenue of amusements at a fair
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mightiness
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/ˈmaɪtinəs/
the quality of being powerful or great
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mimicker
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/ˈmɪmɪkɚ/
a person or thing that imitates another
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minded
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/ˈmaɪndɪd/
inclined or disposed to do something; having a specified attitude
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misanthropic
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/ˌmɪsənˈθrɑpɪk/
disliking or distrusting humankind
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miscellaneous
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/ˌmɪsəˈleɪniəs/
made up of various, unrelated kinds
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misshapen
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/mɪsˈʃeɪpən/
badly or abnormally formed; deformed
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mistakable
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/mɪˈsteɪkəbəl/
liable to be misunderstood or confused with something else
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mixer
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/ˈmɪksɚ/
a device or person that mixes; a social gathering for meeting people
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mockery
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/ˈmɑkəri/
contemptuous ridicule or derision; a thing or person treated as ludicrously inadequate
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