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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inversely
C2
/ˌɪnˈvɝːsli/
in an inverse or contrary manner
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stanchion
C2
/ˈstæn.tʃən/
an upright post, pole, or bar used to support a structure or form part of a barrier
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obliquely
C2
/əˈbliːkli/
In an oblique manner; sideways.
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vernal
C2
/ˈvɝnəl/
relating to, occurring in, or characteristic of spring
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hybridization
C2
/ˌhaɪbrədəˈzeɪʃən/
the crossing of genetically different organisms, varieties, or species to produce hybrids
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octogenarian
C2
/ˌɑktəd͡ʒɪˈnɛɹiən/
A person between 80 and 89 years old.
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extrapolation
C2
/ɛkˌstræpəˈleɪʃən/
An inference about some hypothetical situation based on known facts.
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vivacity
C2
/vɪˈvæsɪti/
The quality or state of being vivacious.
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deferential
C2
/ˌdɛfəˈrɛnʃəl/
showing respectful submission to another person's authority, wishes, or judgment
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moneyed
C2
/ˈmʌniːd/
having an abundant supply of money or possessions of value
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headsman
C2
/ˈhɛdzmən/
historical: an executioner who puts condemned people to death by beheading
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cutaneous
C2
/kjuˈteɪniəs/
of, relating to, existing on, or affecting the skin
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leaderless
C2
/ˈliːdɚləs/
having no person or group in command or providing direction
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quadruped
C2
/ˈkwɑdɹəˌpɛd/
having four feet
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tenaciously
C2
/təˈneɪʃəsli/
In a determined way, refusing to give up.
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blue jay
C2
/ˈbluːˌdʒeɪ/
a crested North American jay with bright blue, white, and black plumage
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derisively
C2
/dɝˈɪsɪvli/
In a mocking, scornful way.
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idiosyncrasy
C2
/ˌɪdiəˈsɪŋkɹəsi/
An unusual habit or feature that is typical of one particular person.
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vegetate
C2
/ˈvɛdʒəˌteɪt/
to live in a passive, monotonous, or mentally inactive way
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electrochemical
C2
/ˌəˌlɛktroʊˈkɛmɪkəl/
of or involving electrochemistry
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pyrotechnic
C2
/ˌpaɪroʊˈtɛknɪk/
relating to fireworks or the techniques used to make and display them
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relativistic
C2
/ˌrɛlətɪˈvɪstɪk/
relating or subject to the special or the general theory of relativity
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prudential
C2
/pɹuˈdɛn.ʃəl/
arising from or characterized by prudence especially in business matters
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mutineer
C2
/ˌmjuː.tənˈɪr/
a person who takes part in a mutiny, especially a sailor or soldier rebelling collectively against commanding officers
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prostration
C2
/pɹɒsˈtɹeɪʃən/
an abrupt failure of function or complete physical exhaustion
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selectman
C2
/səˈlɛktmən/
a member of an elected board that serves as the chief administrative authority of a New England town
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abortive
C2
/əˈbɔɹ.tɪv/
failing to accomplish an intended result
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galvanize
C2
/ˈɡælvənaɪ̯z/
to stimulate muscles by administering a shock
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teetotaller
C2
/ˈtitoʊtəlɚ/
a total abstainer from alchohol
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aerate
C2
/ˈer.eɪt/
to supply or expose something to air or oxygen
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wistfully
C2
/ˈwɪstfəli/
In a sad, thoughtful way, often while longing for something.
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refractive
C2
/rɪˈfræktɪv/
relating to refraction or to the bending of light, sound, or another wave
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permeable
C2
/ˈpɝmiəbəl/
allowing fluids or gases to pass or diffuse through
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chromatic
C2
/kɹəˈmætɪk/
relating to color or to differences in color
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genomic
C2
Relating to a genome, the complete set of genes in an organism.
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stoicism
C2
/ˈstoʊɪsɪzəm/
The quality of accepting pain or hardship calmly, without complaining.
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tangential
C2
/tænˈd͡ʒɛn.t͡ʃəl/
of or relating to or acting along or in the direction of a tangent
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decoction
C2
/dɪˈkɑkʃən/
a medicinal or herbal liquid made by boiling plant material in water
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histrionic
C2
/ˌhɪs.triˈɑ.nɪk/
Overly dramatic or emotional, especially to get attention.
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papier-mâché
C2
/ˌpeɪ.pɚ məˈʃeɪ/
a moldable material made from paper pulp or strips of paper mixed with glue or paste and hardened when dry
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high-toned
C2
/ˌhaɪˈtoʊnd/
dated, especially US: belonging to or characteristic of high social rank; aristocratic or refined
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dentition
C2
/dɛnˈtɪʃən/
the number, kinds, and arrangement of teeth in a person or animal
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encyclical
C2
/ɛnˈsɪk.lɪ.kəl/
an authoritative pastoral letter issued by the pope and circulated broadly within the Roman Catholic Church
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perfumery
C2
/pɚˈfjuːməri/
perfumes or fragrant preparations collectively
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seaward
C2
/ˈsiːwə(ɹ)d/
in the direction of the sea
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protrusion
C2
/pɹəˈtɹuːʒən/
Something that sticks out from a surface; a bulge.
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pell-mell
C2
/ˌpɛlˈmɛl/
in a confused, disorderly rush, without plan or restraint
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churchman
C2
/ˈtʃɝːtʃmən/
a male member of the clergy or another man holding authority in a Christian church
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totter
C2
/ˈtɑtɚ/
To walk or stand unsteadily, as if about to fall.
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Carboniferous
C2
/ˌkɑɹbəˈnɪfɚəs/
relating to the geological period between the Devonian and Permian, about 359 to 299 million years ago
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plenipotentiary
C2
/plɛn.ɪ.poʊˈtɛn.ʃ(i)əɹ.i/
A person invested with full powers, especially as the diplomatic agent of a sovereign state, (originally) charged with handling a certain matter.
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rub-a-dub
C2
/ˌrʌb ə ˈdʌb/
the repeated beating or sound of a drum; a continuous rhythmic drumming
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obstinately
C2
/ˈɑbstɪnətli/
In an obstinate manner.
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twopence
C2
/ˈtʌ.pəns/
a former United Kingdom silver coin
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portentous
C2
/pɔː(ɹ)ˈtɛntəs/
of momentous or ominous significance
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phosphor
C2
/ˈfɑs.fɚ/
a substance that emits light after being excited by radiation or another form of energy, as in fluorescent lamps and display screens
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infallibility
C2
/ɪnˌfæləˈbɪləti/
The quality of never being wrong or never making a mistake.
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horsewoman
C2
/ˈhɔːrsˌwʊm.ən/
a woman who rides horses, especially one skilled in riding or managing them
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concurrence
C2
/kənˈkɝːəns/
Agreement between people or in their opinions.
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pathogenic
C2
/pæθəˈd͡ʒɛnɪk/
Able to cause (harmful) disease.
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surreptitious
C2
/səˌɹɛpˈtɪʃəs/
Done secretly to avoid being noticed.
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augury
C2
/ˈɔː.ɡjʊ.ɹi/
an event that is experienced as indicating important things to come
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rationalism
C2
/ˈræʃ.ən.əl.ɪ.zəm/
in philosophy, the view that reason can provide at least some substantive knowledge independently of sensory experience, often through innate ideas or a priori reasoning
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belabor
C2
/bɪˈleɪbɝ/
to attack verbally with harsh criticism
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qualitative
C2
/ˈkwɑ.ləˌteɪ.tɪv/
Based on the qualities or nature of something rather than on numbers or amounts.
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futurity
C2
/fjuːˈtjʊəɹɪti/
The future.
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angsty
C2
/ˈæŋ(k)sti/
Full of anxiety, worry, or moody emotional turmoil.
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contributory
C2
/ˈkɑntrɪbjəˌtɔri/
helping to cause or bring about a result
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leprous
C2
/ˈlɛprəs/
affected by or relating to leprosy
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noway
C2
/ˈnoʊˌweɪ/
in no way or degree; not at all; now chiefly archaic or dialectal
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revelatory
C2
[ˈɹɛvələtoɹi]
Revealing something surprising or previously unknown.
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unfeasible
C2
/ʌnˈfi.zə.bəl/
Not able to be done or carried out; not practical.
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syllogism
C2
/ˈsɪlədʒɪz(ə)m/
An argument whose conclusion is supported by two premises, of which one contains the term that is the predicate of the conclusion, and the other contains the term that is the subject of the conclusion; common to both premises is a term that is excluded from the conclusion.
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spay
C2
/ˈspeɪ/
remove the ovaries of
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corroborative
C2
/kəˈrɑːbəˌreɪtɪv/
serving to support, confirm, or strengthen a statement or conclusion with additional evidence
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psychical
C2
/ˈsaɪkɪkəl/
Performed by or pertaining to the psyche (the mind, spirit, or both): mental, psychic.
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desiccation
C2
/ˌdɛsəˈkeɪʃən/
the process of removing moisture from something or causing it to become completely dry
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gimbal
C2
/ˈd͡ʒɪmbəl/
a device for suspending something, such as a ship's compass, so that it will remain level when its support is tipped.
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faintness
C2
/ˈfeɪntnəs/
the trait of lacking boldness and courage
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stiffly
C2
/ˈstɪfli/
in a stiff manner
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demonstrably
C2
/diˈmɑnstrəbli/
in an obvious and provable manner
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flycatcher
C2
/ˈflaɪˌkætʃɚ/
any of various small birds that characteristically catch flying insects, especially members of the Old World family Muscicapidae or the New World family Tyrannidae
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diffraction
C2
/dɪˈfɹækʃən/
when light passes sharp edges or goes through narrow slits the rays are deflected and produce fringes of light and dark bands
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precession
C2
/priːˈsɛʃən/
the slow conical motion of a spinning body's rotation axis, usually caused by an external torque
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brakeman
C2
/ˈbreɪkmən/
historical: a railway worker responsible for operating a train's brakes and assisting with couplings and switching
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solvable
C2
/ˈsɑlvəbəl/
capable of being solved
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sagittal
C2
/ˈsædʒətəl/
anatomy: relating to a vertical plane that divides the body into left and right portions
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nominally
C2
/ˈnɑmɪnəli/
in name only
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languorous
C2
/ˈlæŋ(ɡ)ərəs/
lacking energy, spirit, liveliness or vitality; languid, lackadaisical.
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rhythmical
C2
/ˈɹɪð.mɪ.kəl/
rhythmic
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herbaceous
C2
/ɝˈbeɪʃəs/
having soft green stems rather than persistent woody tissue, especially of a plant or plant part
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hypertrophy
C2
/haɪˈpɝː.trə.fi/
an increase in the size of an organ or tissue caused by enlargement of its cells
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malodorous
C2
/ˌmælˈoʊ.də.ɹəs/
Having a bad odor.
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expedience
C2
/ɪkˈspiːdiəns/
fitness or practical suitability for achieving a particular end
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libidinous
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/lɪˈbɪ.dɪ.nəs/
driven by lust
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capstan
C2
/ˈkæpstən/
a vertical revolving cylinder used to wind a rope or cable and exert heavy pulling force, especially aboard a ship
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