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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dicotyledonous
C2
/ˌdaɪkɑtəlˈiːdənəs/
having an embryo with two cotyledons, as in the flowering plants traditionally called dicotyledons
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diluvial
C2
/daɪˈluːviəl/
relating to, caused by, or deposited by a great flood
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fossorial
C2
/fɑˈsɔriəl/
adapted for digging or for living chiefly underground
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metamorphism
C2
/ˌmɛtəˈmɔrˌfɪzəm/
the mineralogical and structural alteration of rock by heat, pressure, or chemically active fluids without complete melting
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iron mould
C2
/ˈaɪərn ˌmoʊld/
a yellow, brown, or reddish stain on cloth, paper, or a similar material caused by rusty iron or an iron-based ink
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erethism
C2
/ˈɛrəˌθɪzəm/
an abnormally high degree of irritability or responsiveness to stimulation
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repastination
C2
/riːˌpæstɪˈneɪʃən/
obsolete: the act of digging or turning over soil again
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succedaneous
C2
/ˌsʌksəˈdeɪniəs/
rare: serving in place of something else; acting as a substitute
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intercalate
C2
/ɪnˈtɝːkəˌleɪt/
to insert an extra day or month into a calendar so that it remains aligned with astronomical cycles
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gasfitter
C2
/ˈɡæsˌfɪt.ɚ/
a tradesperson who installs, connects, maintains, or repairs gas pipes, fixtures, and appliances
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bisulfate
C2
/baɪˈsʌl.feɪt/
the hydrogen sulfate ion, HSO4-, which is formed when sulfuric acid loses one proton
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farmsteading
C2
/ˈfɑːrmˌstiː.dɪŋ/
chiefly British or Scottish: a farmstead, especially the farmhouse and its surrounding farm buildings considered as a group
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savorless
C2
/ˈseɪvərləs/
having little or no taste, flavor, or appetizing quality
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homologize
C2
/həˈmɑːlədʒaɪz/
to identify or demonstrate that structures in different organisms correspond because of shared evolutionary origin
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sublittoral
C2
/ˌsʌbˈlɪtərəl/
situated or formed in the permanently submerged coastal zone below the low-tide line
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inveteracy
C2
/ɪnˈvɛtərəsi/
the quality or state of being long-established, obstinate, or deeply persistent
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laciniate
C2
/ləˈsɪniət/
botany and zoology: cut into a fringe or into deep, narrow, irregular lobes
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muriate
C2
/ˈmjʊriət/
an obsolete chemical name for a chloride, a salt regarded as derived from muriatic acid
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engrailed
C2
/ɪnˈɡreɪld/
heraldry: edged with a series of small inward-curving semicircles whose points face outward
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deliquescent
C2
/ˌdɛlɪˈkwɛsənt/
chemistry: absorbing enough moisture from the air to dissolve gradually and form a solution
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antinomianism
C2
/æntiˈnoʊmi.ənɪzəm/
the Christian theological doctrine that salvation by faith and grace frees believers from the obligation of moral law
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elater
C2
/ˈɛlətɚ/
a click beetle of the family Elateridae, able to spring into the air with a clicking movement when placed on its back
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infusorial
C2
/ˌɪnfjʊˈzɔːriəl/
historical biology: relating to, containing, or formed from Infusoria, a former broad grouping of microscopic aquatic organisms
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testaceous
C2
/tɛˈsteɪʃəs/
zoology and botany: dull brick-red, orange-brown, or yellowish-brown in color
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circumambient
C2
/ˌsɝːkəmˈæmbiənt/
surrounding something on every side; encompassing
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coriaceous
C2
/ˌkɔːriˈeɪʃəs/
having a tough, thick, or flexible texture resembling leather, especially in a leaf, shell, or skin
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phalanger
C2
/fəˈlændʒɚ/
an Australasian arboreal marsupial of the family Phalangeridae, including the cuscuses and brushtail possums
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iodic
C2
/aɪˈɑːdɪk/
relating to iodine, especially to compounds in which iodine has oxidation state +5, such as iodic acid and iodates
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micaceous
C2
/maɪˈkeɪʃəs/
containing or consisting partly of mica
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acuminate
C2
/əˈkjuːmənət/
tapering gradually to a long, narrow point, especially in botanical or zoological description
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dry goods
C2
/ˈdraɪˌɡʊdz/
historical and chiefly US: textiles, clothing, and related merchandise sold by a shop
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parenchymatous
C2
/ˌperənˈkaɪmətəs/
consisting of, relating to, or affecting parenchyma, the functional or softer tissue of an organ
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interpellate
C2
/ˌɪntɚˈpɛleɪt/
formal: to interrupt or address someone with a question or challenge
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stylobate
C2
/ˈstaɪ.lə.beɪt/
architecture: the uppermost step or platform of a classical building's stepped base, directly supporting its columns
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terraqueous
C2
/təˈreɪkwiəs/
consisting of both land and water, especially in the phrase terraqueous globe for Earth
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vigesimal
C2
/vɪˈdʒɛsɪməl/
based on the number twenty, especially describing a numeral system with twenty as its base
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ischiopubic
C2
/ˌɪski.oʊˈpjuːbɪk/
relating to both the ischium and the pubis, especially the region or ramus where these pelvic bones meet
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occipitoparietal
C2
/ɑkˌsɪpɪtoʊpəˈraɪətəl/
relating to both the occipital and parietal bones or regions of the skull and brain
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rugosity
C2
/ruːˈɡɑːsəti/
the quality or degree of being rough, wrinkled, or ridged
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lyrate
C2
/ˈlaɪreɪt/
shaped like a lyre, especially with two outward curves that turn inward toward their ends
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pectinate
C2
/ˈpɛktəneɪt/
biology: shaped or arranged like the teeth of a comb
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shagreen
C2
/ʃʌˈɡriːn/
a tough leather with a granular surface, historically made from horsehide and now commonly from shark or ray skin
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sulcate
C2
/ˈsʌlkeɪt/
anatomy, botany, or zoology: marked with one or more deep, narrow grooves or furrows
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antedate
C2
/ˌæntiˈdeɪt/
to exist or occur earlier than something else
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Eleatic
C2
/ˌɛliˈætɪk/
relating to the ancient Greek philosophical school that held reality to be one, continuous, and unchanging
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finalism
C2
/ˈfaɪnəlɪzəm/
the doctrine that natural processes are directed toward ends, purposes, or final causes
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imaginability
C2
/ɪˌmædʒənəˈbɪləti/
the quality of being possible to imagine or form a mental representation of
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inferable
C2
/ɪnˈfɝəbəl/
capable of being inferred or reached as a conclusion from evidence or premises
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interrelatedness
C2
/ˌɪntɚrɪˈleɪtɪdnəs/
the state or quality of being mutually related or connected
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propaedeutic
C2
/ˌproʊpɪˈduːtɪk/
preparatory or introductory to a more advanced field of study
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teleology
C2
/ˌtɛliˈɑlədʒi/
explanation of phenomena by the ends, purposes, or goals they are said to serve
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unended
C2
/ʌnˈɛndɪd/
not brought to an end; continuing or unfinished
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unmanipulated
C2
/ˌʌnməˈnɪpjəˌleɪtɪd/
not handled, altered, controlled, or artificially arranged
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theolatry
C2
/θiˈɑː.lə.tri/
the worship of a god or gods
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baggageman
C2
/ˈbæɡɪdʒˌmæn/
historical: a railway employee responsible for receiving, guarding, sorting, and delivering passengers' baggage, often in a baggage car
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ascription
C2
/əˈskrɪpʃən/
the act of attributing a quality, cause, statement, or work to a person or thing
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conative
C2
/ˈkoʊnətɪv/
psychology and philosophy: relating to desire, volition, striving, or action directed toward a goal
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occasionalism
C2
/əˈkeɪʒənəˌlɪzəm/
philosophy: the doctrine that created things do not directly cause events but merely provide occasions on which God produces the corresponding effects
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calcar
C2
/ˈkælkɑr/
anatomy and zoology: a spur-shaped projection or process
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retaliative
C2
/rɪˈtæliˌeɪtɪv/
intended or inclined to retaliate; retaliatory
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wine lees
C2
/ˈwaɪnˌliːz/
the sediment of yeast, grape matter, and other particles that settles after wine fermentation
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arrector
C2
/əˈrɛktər/
an erector muscle; especially one of the tiny arrector pili muscles that raise a hair
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flexuous
C2
/ˈflɛkʃ(ə)wəs/
having turns or windings
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ferial
C2
/ˈfɪr.i.əl/
relating to an ordinary weekday rather than a religious festival, especially in Christian liturgy
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trompe-l’oeil
C2
/ˌtrɔːmp ˈlɔɪ/
an artistic technique that uses realistic detail to create the illusion that painted objects are three-dimensional
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gibbosity
C2
/ɡɪˈbɑsəti/
the state of being convex or noticeably bulging
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lexicographical
C2
/ˌlɛksɪkəˈɡɹæfɪkəl/
relating to the writing, editing, or study of dictionaries
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muniment
C2
/ˈmjunəmənt/
a legal deed, charter, or other document preserved as evidence of a right or title
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representationalism
C2
/ˌɹɛpɹɪzɛnˈteɪʃənəlˌɪzəm/
the use or support of recognizable, realistic subjects in art
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supererogatory
C2
/suːpəɹɛˈɹɒɡətəɹi/
more than is needed, desired, or required
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commination
C2
/ˌkɒmɪˈneɪʃən/
a formal denunciation or threat of punishment, especially divine punishment
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sizar
C2
/ˈsaɪzər/
historical: a Cambridge or Trinity College Dublin student receiving financial support, sometimes in return for duties
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paragrapher
C2
/ˈpær.əˌɡræf.ər/
a writer of short newspaper paragraphs, especially gossip, editorial, or society items
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appetition
C2
/ˌæpəˈtɪʃən/
philosophy and psychology: desire directed toward obtaining or pursuing something
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choiceworthy
C2
/ˈtʃɔɪsˌwɝði/
ethics: worthy of being chosen or pursued as good
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eudaemonistic
C2
/ˌjuːdɪməˈnɪstɪk/
ethics: relating to the view that happiness or human flourishing is the highest good
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impassibility
C2
/ɪmˌpæsəˈbɪləti/
the condition of being incapable of suffering, feeling, or being emotionally affected
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rectilineal
C2
/ˌrɛktəˈlɪniəl/
formed by, bounded by, or moving in straight lines
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simpliciter
C2
/sɪmˈplɪsɪtɚ/
philosophy and law: absolutely or without qualification, rather than only in some respect
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unideal
C2
/ˌʌnaɪˈdiːəl/
not ideal; lacking an elevated, perfect, or exemplary quality
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unintermitting
C2
/ˌʌnˌɪntɚˈmɪtɪŋ/
continuing without interruption; unceasing
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unlaborious
C2
/ˌʌnləˈbɔriəs/
not requiring or involving much labor or effort
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diaphaneity
C2
/ˌdaɪəfəˈniəti/
the quality of being transparent or allowing light to pass through
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feelable
C2
/ˈfiːləbəl/
capable of being felt through touch, sensation, or emotion
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homophony
C2
/həˈmɑfəni/
the relation or quality of words having the same pronunciation but different meanings or origins
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abstractedness
C2
/æbˈstræktɪdnəs/
the state of being absorbed in thought and inattentive to one's surroundings
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cogitative
C2
/ˈkɑdʒəˌteɪtɪv/
capable of, inclined to, or concerned with thought and reflection
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rencounter
C2
/ˌrɛnˈkaʊntər/
to meet, encounter, or collide with
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introgress
C2
/ˌɪntɹəˈɡɹɛs/
to introduce genes from one species or population into the gene pool of another through hybridization and repeated backcrossing
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carabiner
C2
/ˌkærəˈbiːnər/
a metal loop with a spring-loaded gate, used to connect ropes and gear in climbing, mountaineering, and rescue work
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essentialize
C2
/ɪˈsɛnʃəˌlaɪz/
to reduce someone or something to a set of supposedly inherent traits, ignoring variation, context, or individual difference
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