| abducent | (adjective) especially of muscles; drawing away from the midline of the body or from an adjacent part | Synonyms: abducting |
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| abducting | (adjective) especially of muscles; drawing away from the midline of the body or from an adjacent part | Synonyms: abducent |
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| acidulent | (adjective) being sour to the taste | Synonyms: acid, acidic, acidulous |
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| acidulous | (adjective) being sour to the taste | Synonyms: acid, acidic, acidulent |
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| aciduric | (adjective) especially of some bacteria; growing well in an acid medium | Synonyms: acidophilic, acidophilous |
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| adducent | (adjective) especially of muscles; bringing together or drawing toward the midline of the body or toward an adjacent part | Synonyms: adducting, adductive |
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| adducting | (adjective) especially of muscles; bringing together or drawing toward the midline of the body or toward an adjacent part | Synonyms: adducent, adductive |
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| adductive | (adjective) especially of muscles; bringing together or drawing toward the midline of the body or toward an adjacent part | Synonyms: adducent, adducting |
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| adulatory | (adjective) obsequiously complimentary | Synonyms: flattering |
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| adult | (adjective) (of animals) fully developed | Synonyms: big, full-grown, fully grown, grown, grownup |
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| (adjective) designed to arouse lust | Synonyms: pornographic |
| adulterant | (adjective) making impure or corrupt by adding extraneous materials | Synonyms: adulterating |
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| adulterate | (adjective) mixed with impurities | Synonyms: adulterated, debased |
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| adulterated | (adjective) mixed with impurities | Synonyms: adulterate, debased |
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| adulterating | (adjective) making impure or corrupt by adding extraneous materials | Synonyms: adulterant |
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| adulterine | (adjective) conceived in adultery | - |
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| adulterous | (adjective) characterized by adultery | Synonyms: extracurricular, extramarital |
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| (adjective) not faithful to a spouse or lover | Synonyms: cheating, two-timing |
| adumbrative | (adjective) indistinctly prophetic | Synonyms: foreshadowing, prefigurative |
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| adust | (adjective) burned brown by the sun | - |
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| (adjective) dried out by heat or excessive exposure to sunlight | Synonyms: baked, parched, scorched, sunbaked |
| archducal | (adjective) belonging to or befitting an archduke or his archduchy | - |
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| arduous | (adjective) difficult to accomplish; demanding considerable mental effort and skill | - |
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| (adjective) characterized by effort to the point of exhaustion; especially physical effort | Synonyms: backbreaking, grueling, gruelling, hard, heavy, laborious, operose, punishing, toilsome |
| (adjective) taxing to the utmost; testing powers of endurance | Synonyms: straining, strenuous |
| assiduous | (adjective) marked by care and persistent effort | Synonyms: sedulous |
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| caducean | (adjective) of or relating to a caduceus | - |
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| caducous | (adjective) shed at an early stage of development | Synonyms: shed |
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| coeducational | (adjective) attended by members of both sexes | Synonyms: co-ed |
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| conducive | (adjective) tending to bring about; being partly responsible for | Synonyms: contributing, contributive, contributory, tributary |
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| conductive | (adjective) having the quality or power of conducting heat or electricity or sound; exhibiting conductivity | - |
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| counterproductive | (adjective) tending to hinder the achievement of a goal | - |
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| credulous | (adjective) disposed to believe on little evidence | - |
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| (adjective) showing a lack of judgment or experience | - |
| deciduous | (adjective) (of plants and shrubs) shedding foliage at the end of the growing season | - |
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| (adjective) (of teeth, antlers, etc.) being shed at the end of a period of growth | - |
| deducible | (adjective) capable of being deduced | - |
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| deductible | (adjective) acceptable as a deduction (especially as a tax deduction) | - |
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| deductive | (adjective) involving inferences from general principles | - |
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| (adjective) relating to logical deduction | - |
| dual | (adjective) consisting of or involving two parts or components usually in pairs | Synonyms: double, duple |
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| (adjective) a grammatical number category referring to two items or units as opposed to one item (singular) or more than two items (plural) | - |
| (adjective) having more than one decidedly dissimilar aspects or qualities | Synonyms: double, three-fold, threefold, treble, two-fold, twofold |
| dualistic | (adjective) of or relating to the philosophical doctrine of dualism | Synonyms: Manichaean |
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| dubious | (adjective) open to doubt or suspicion | Synonyms: doubtful, dubitable, in question |
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| (adjective) fraught with uncertainty or doubt | Synonyms: doubtful |
| (adjective) not convinced | - |
| dubitable | (adjective) open to doubt or suspicion | Synonyms: doubtful, dubious, in question |
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| ducal | (adjective) of or belonging to or suitable for a duke | - |
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| duckbill | (adjective) having a beak resembling that of a duck | Synonyms: duck-billed |
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| ductile | (adjective) capable of being shaped or bent or drawn out | Synonyms: malleable, pliable, pliant, tensile, tractile |
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| (adjective) easily influenced | Synonyms: malleable |
| ductless | (adjective) not having a duct | - |
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| dud | (adjective) failing to detonate; especially not charged with an active explosive | - |
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| due | (adjective) owed and payable immediately or on demand | - |
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| (adjective) suitable to or expected in the circumstances | - |
| (adjective) capable of being assigned or credited to | Synonyms: ascribable, imputable, referable |
| (adjective) scheduled to arrive | - |
| dulcet | (adjective) pleasing to the ear | Synonyms: honeyed, mellifluous, mellisonant, sweet |
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| (adjective) extremely pleasant in a gentle way | - |
| dull | (adjective) not having a sharp edge or point | - |
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| (adjective) emitting or reflecting very little light | - |
| (adjective) lacking in liveliness or animation | - |
| (adjective) not keenly felt | - |
| (adjective) darkened with overcast | Synonyms: leaden |
| (adjective) (of business) not active or brisk | Synonyms: slow, sluggish |
| (adjective) blunted in responsiveness or sensibility | - |
| (adjective) being or made softer or less loud or clear | Synonyms: muffled, muted, softened |
| (adjective) slow to learn or understand; lacking intellectual acuity | Synonyms: dense, dim, dumb, obtuse, slow |
| (adjective) not clear and resonant; sounding as if striking with or against something relatively soft | Synonyms: thudding |
| (adjective) (of color) very low in saturation; highly diluted | - |
| (adjective) so lacking in interest as to cause mental weariness | Synonyms: boring, deadening, ho-hum, irksome, slow, tedious, tiresome, wearisome |
| dulled | (adjective) deprived of color | Synonyms: greyed |
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| (adjective) made dull or blunt | Synonyms: blunted |
| (adjective) having lost or been caused to lose interest because of overexposure | Synonyms: benumbed |
| dumb | (adjective) slow to learn or understand; lacking intellectual acuity | Synonyms: dense, dim, dull, obtuse, slow |
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| (adjective) unable to speak because of hereditary deafness | Synonyms: mute, silent |
| (adjective) temporarily incapable of speaking | Synonyms: speechless |
| (adjective) lacking the power of human speech | - |
| dumbfounded | (adjective) as if struck dumb with astonishment and surprise | Synonyms: dumbstricken, dumbstruck, dumfounded, flabbergasted, stupefied, thunderstruck |
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| dumbfounding | (adjective) bewildering or striking dumb with wonder | Synonyms: astounding, dumfounding |
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| dumbstricken | (adjective) as if struck dumb with astonishment and surprise | Synonyms: dumbfounded, dumbstruck, dumfounded, flabbergasted, stupefied, thunderstruck |
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| dumbstruck | (adjective) as if struck dumb with astonishment and surprise | Synonyms: dumbfounded, dumbstricken, dumfounded, flabbergasted, stupefied, thunderstruck |
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| dumfounded | (adjective) as if struck dumb with astonishment and surprise | Synonyms: dumbfounded, dumbstricken, dumbstruck, flabbergasted, stupefied, thunderstruck |
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| dumfounding | (adjective) bewildering or striking dumb with wonder | Synonyms: astounding, dumbfounding |
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| dummy | (adjective) having the appearance of being real but lacking capacity to function | - |
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| dumpy | (adjective) resembling a garbage dump | - |
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| (adjective) short and plump | Synonyms: podgy, pudgy, roly-poly, tubby |
| (adjective) short and thick; as e.g. having short legs and heavy musculature | Synonyms: chunky, low-set, squat, squatty, stumpy |
| dun | (adjective) of a dull greyish brown to brownish grey color | - |
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| duncical | (adjective) (used informally) stupid | Synonyms: blockheaded, boneheaded, duncish, fatheaded, loggerheaded, thick-skulled, thick, thickheaded, wooden-headed |
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| duncish | (adjective) (used informally) stupid | Synonyms: blockheaded, boneheaded, duncical, fatheaded, loggerheaded, thick-skulled, thick, thickheaded, wooden-headed |
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| duodecimal | (adjective) based on twelve | - |
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| duodenal | (adjective) in or relating to the duodenum | - |
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| duple | (adjective) consisting of or involving two parts or components usually in pairs | Synonyms: double, dual |
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| duplex | (adjective) allowing communication in opposite directions simultaneously | - |
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| (adjective) (used technically of a device or process) having two parts | - |
| duplicable | (adjective) capable of being duplicated | Synonyms: duplicatable |
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| duplicatable | (adjective) capable of being duplicated | Synonyms: duplicable |
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| duplicate | (adjective) being two identical | Synonyms: matching, twin, twinned |
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| (adjective) identically copied from an original | - |
| duplicitous | (adjective) marked by deliberate deceptiveness especially by pretending one set of feelings and acting under the influence of another | Synonyms: ambidextrous, deceitful, double-dealing, double-faced, double-tongued, Janus-faced, two-faced |
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| durable | (adjective) very long lasting | Synonyms: indestructible, perdurable, undestroyable |
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| (adjective) existing for a long time | Synonyms: lasting, long-lasting, long-lived |
| (adjective) capable of withstanding wear and tear and decay | Synonyms: long-wearing |
| dural | (adjective) of or relating to the dura mater | - |
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| dusky | (adjective) naturally having skin of a dark color | Synonyms: dark-skinned, swart, swarthy |
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| (adjective) lighted by or as if by twilight | Synonyms: twilight, twilit |
| dustlike | (adjective) as fine and powdery as dust | - |
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| dusty | (adjective) covered with a layer of dust | Synonyms: dust-covered |
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| (adjective) lacking originality or spontaneity; no longer new | Synonyms: cold, moth-eaten, stale |
| duteous | (adjective) willingly obedient out of a sense of duty and respect | Synonyms: dutiful |
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| dutiable | (adjective) subject to import tax | - |
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| dutiful | (adjective) willingly obedient out of a sense of duty and respect | Synonyms: duteous |
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| educated | (adjective) possessing an education (especially having more than average knowledge) | - |
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| (adjective) characterized by full comprehension of the problem involved | Synonyms: enlightened |
| educational | (adjective) relating to the process of education | - |
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| (adjective) providing knowledge | - |
| educative | (adjective) resulting in education | - |
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| endurable | (adjective) capable of being borne though unpleasant | Synonyms: bearable, sufferable, supportable |
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| enduring | (adjective) patiently bearing continual wrongs or trouble | Synonyms: long-suffering |
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| (adjective) lasting a long time | Synonyms: abiding, imperishable |
| epidural | (adjective) on or outside the dura mater | Synonyms: extradural |
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| extradural | (adjective) on or outside the dura mater | Synonyms: epidural |
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| fiducial | (adjective) relating to or of the nature of a legal trust (i.e. the holding of something in trust for another) | Synonyms: fiduciary |
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| (adjective) used as a fixed standard of reference for comparison or measurement | - |
| (adjective) based on trust | - |
| fiduciary | (adjective) relating to or of the nature of a legal trust (i.e. the holding of something in trust for another) | Synonyms: fiducial |
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| fraudulent | (adjective) involving deception | Synonyms: deceitful, fallacious |
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| gastroduodenal | (adjective) of or relating to the stomach and the duodenum | - |
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| glandular | (adjective) relating to or affecting or functioning as a gland | - |
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| gradual | (adjective) proceeding in small stages | - |
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| (adjective) (of a topographical gradient) not steep or abrupt | - |
| graduate | (adjective) of or relating to studies beyond a bachelor's degree | Synonyms: postgraduate |
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| graduated | (adjective) marked with or divided into degrees | Synonyms: calibrated |
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| (adjective) taking place by degrees | Synonyms: gradational, gradatory |
| incredulous | (adjective) not disposed or willing to believe; unbelieving | - |
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| individual | (adjective) being or characteristic of a single thing or person | Synonyms: single |
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| (adjective) separate and distinct from others of the same kind | Synonyms: case-by-case, item-by-item |
| (adjective) concerning one person exclusively | Synonyms: private |
| (adjective) characteristic of or meant for a single person or thing | Synonyms: single |
| individualised | (adjective) made for or directed or adjusted to a particular individual | Synonyms: individualized, personalised, personalized |
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| individualist | (adjective) marked by or expressing individuality | Synonyms: individualistic |
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| individualistic | (adjective) with minimally restricted freedom in commerce | Synonyms: laissez-faire |
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| (adjective) marked by or expressing individuality | Synonyms: individualist |
| individualized | (adjective) made for or directed or adjusted to a particular individual | Synonyms: individualised, personalised, personalized |
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| indubitable | (adjective) too obvious to be doubted | Synonyms: beyond doubt |
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| induced | (adjective) brought about or caused; not spontaneous | - |
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| inducive | (adjective) inducing or influencing; leading on | Synonyms: inductive |
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| inductive | (adjective) of reasoning; proceeding from particular facts to a general conclusion | - |
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| (adjective) arising from inductance | - |
| (adjective) inducing or influencing; leading on | Synonyms: inducive |
| indulgent | (adjective) characterized by or given to yielding to the wishes of someone | - |
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| (adjective) being favorably inclined | - |
| (adjective) tolerant or lenient | Synonyms: lenient, soft |
| indurate | (adjective) emotionally hardened | Synonyms: callous, pachydermatous |
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