| diarrheal | (adjective) of or relating to diarrhea | Synonyms: diarrheic, diarrhetic, diarrhoeal, diarrhoeic, diarrhoetic |
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| diarrheic | (adjective) of or relating to diarrhea | Synonyms: diarrheal, diarrhetic, diarrhoeal, diarrhoeic, diarrhoetic |
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| diarrhetic | (adjective) of or relating to diarrhea | Synonyms: diarrheal, diarrheic, diarrhoeal, diarrhoeic, diarrhoetic |
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| diarrhoeal | (adjective) of or relating to diarrhea | Synonyms: diarrheal, diarrheic, diarrhetic, diarrhoeic, diarrhoetic |
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| diarrhoeic | (adjective) of or relating to diarrhea | Synonyms: diarrheal, diarrheic, diarrhetic, diarrhoeal, diarrhoetic |
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| diarrhoetic | (adjective) of or relating to diarrhea | Synonyms: diarrheal, diarrheic, diarrhetic, diarrhoeal, diarrhoeic |
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| diastolic | (adjective) of or relating to a diastole or happening during a diastole | - |
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| diatomic | (adjective) of or relating to a molecule made up of two atoms | - |
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| diatonic | (adjective) based on the standard major or minor scales consisting of 5 tones and 2 semitones without modulation by accidentals | - |
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| (adjective) based on or using the five tones and two semitones of the major or minor scales of western music | - |
| diazo | (adjective) relating to or containing diazonium | - |
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| dicarboxylic | (adjective) containing two carboxyls per molecule | - |
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| dicey | (adjective) of uncertain outcome; especially fraught with risk | Synonyms: chanceful, chancy, dodgy |
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| dichotomous | (adjective) divided or dividing into two sharply distinguished parts or classifications | - |
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| dichromatic | (adjective) of or relating to dichromatism | - |
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| (adjective) having two colors | Synonyms: bichrome, bicolor, bicolored, bicolour, bicoloured |
| dickey | (adjective) (British informal) faulty | Synonyms: dicky |
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| dicky | (adjective) (British informal) faulty | Synonyms: dickey |
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| diclinous | (adjective) having pistils and stamens in separate flowers | - |
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| dicotyledonous | (adjective) (of a flowering plant) having two cotyledons in the seed | - |
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| dictated | (adjective) determined or decided upon as by an authority | Synonyms: determined, set |
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| dictatorial | (adjective) of or characteristic of a dictator | - |
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| (adjective) expecting unquestioning obedience | Synonyms: authoritarian, overbearing |
| (adjective) characteristic of an absolute ruler or absolute rule; having absolute sovereignty | Synonyms: authoritarian, autocratic, despotic, tyrannic, tyrannical |
| dictyopteran | (adjective) of or relating to or belonging to the order Dictyoptera | - |
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| didactic | (adjective) instructive (especially excessively) | Synonyms: didactical |
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| didactical | (adjective) instructive (especially excessively) | Synonyms: didactic |
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| diestrous | (adjective) (of animals that have several estrous cycles in one breeding season) in a period of sexual inactivity | Synonyms: diestrual, dioestrous, dioestrual |
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| diestrual | (adjective) (of animals that have several estrous cycles in one breeding season) in a period of sexual inactivity | Synonyms: diestrous, dioestrous, dioestrual |
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| dietary | (adjective) of or relating to the diet | Synonyms: dietetic, dietetical |
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| dietetic | (adjective) of or relating to the diet | Synonyms: dietary, dietetical |
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| dietetical | (adjective) of or relating to the diet | Synonyms: dietary, dietetic |
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| different | (adjective) unlike in nature or quality or form or degree | - |
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| (adjective) distinctly separate from the first | - |
| (adjective) differing from all others; not ordinary | - |
| (adjective) distinct or separate | - |
| differentiable | (adjective) possessing a differential coefficient or derivative | - |
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| (adjective) capable of being perceived as different | - |
| differential | (adjective) relating to or showing a difference | - |
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| (adjective) involving or containing one or more derivatives | - |
| differentiated | (adjective) made different (especially in the course of development) or shown to be different | - |
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| (adjective) exhibiting biological specialization; adapted during development to a specific function or environment | - |
| difficult | (adjective) not easy; requiring great physical or mental effort to accomplish or comprehend or endure | Synonyms: hard |
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| (adjective) hard to control | Synonyms: unmanageable |
| diffident | (adjective) lacking self-confidence | Synonyms: shy, timid, unsure |
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| (adjective) showing modest reserve | - |
| diffuse | (adjective) (of light) transmitted from a broad light source or reflected | Synonyms: diffused, soft |
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| (adjective) spread out; not concentrated in one place | - |
| (adjective) lacking conciseness | - |
| diffused | (adjective) (of light) transmitted from a broad light source or reflected | Synonyms: diffuse, soft |
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| (adjective) (of light rays) subjected to scattering by reflection from a rough surface or transmission through a translucent material | - |
| diffusing | (adjective) spreading by diffusion | Synonyms: diffusive, dispersive, disseminative |
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| diffusive | (adjective) spreading by diffusion | Synonyms: diffusing, dispersive, disseminative |
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| digestible | (adjective) capable of being converted into assimilable condition in the alimentary canal | - |
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| digestive | (adjective) relating to or having the power to cause or promote digestion | - |
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| dighted | (adjective) dressed or adorned (as for battle) | - |
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| digital | (adjective) of a circuit or device that represents magnitudes in digits | - |
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| (adjective) relating to or performed with the fingers | - |
| (adjective) displaying numbers rather than scale positions | - |
| digitate | (adjective) resembling a finger | Synonyms: fingerlike |
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| digitigrade | (adjective) (of mammals) walking on the toes with the posterior part of the foot raised (as cats, dogs, and horses do) | - |
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| dignified | (adjective) having or expressing dignity; especially formality or stateliness in bearing or appearance | - |
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| (adjective) having or showing self-esteem | Synonyms: self-respectful, self-respecting |
| dignifying | (adjective) investing with dignity or honor | Synonyms: ennobling |
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| digressive | (adjective) (of e.g. speech and writing) tending to depart from the main point or cover a wide range of subjects | Synonyms: discursive, excursive, rambling |
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| (adjective) of superficial relevance if any | Synonyms: tangential |
| dilapidated | (adjective) in deplorable condition | Synonyms: bedraggled, broken-down, derelict, ramshackle, tatterdemalion, tumble-down |
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| dilatory | (adjective) wasting time | Synonyms: laggard, pokey, poky |
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| dilettante | (adjective) showing frivolous or superficial interest; amateurish | Synonyms: dilettanteish, dilettantish, sciolistic |
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| dilettanteish | (adjective) showing frivolous or superficial interest; amateurish | Synonyms: dilettante, dilettantish, sciolistic |
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| dilettantish | (adjective) showing frivolous or superficial interest; amateurish | Synonyms: dilettante, dilettanteish, sciolistic |
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| diligent | (adjective) characterized by care and perseverance in carrying out tasks | - |
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| (adjective) quietly and steadily persevering especially in detail or exactness | Synonyms: persevering |
| dilute | (adjective) reduced in strength or concentration or quality or purity | Synonyms: diluted |
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| diluted | (adjective) reduced in strength or concentration or quality or purity | Synonyms: dilute |
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| diluvial | (adjective) of or connected with a deluge | Synonyms: diluvian |
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| diluvian | (adjective) of or connected with a deluge | Synonyms: diluvial |
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| dim | (adjective) made dim or less bright | Synonyms: dimmed |
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| (adjective) lacking in light; not bright or harsh | Synonyms: subdued |
| (adjective) offering little or no hope | Synonyms: black, bleak |
| (adjective) lacking clarity or distinctness | Synonyms: faint, shadowy, vague, wispy |
| (adjective) slow to learn or understand; lacking intellectual acuity | Synonyms: dense, dull, dumb, obtuse, slow |
| dimensional | (adjective) of or relating to dimensions | - |
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| (adjective) having dimension--the quality or character or stature proper to a person | - |
| dimensioning | (adjective) indicating or determining size and position in space | - |
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| diminished | (adjective) (of an organ or body part) diminished in size or strength as a result of disease or injury or lack of use | Synonyms: atrophied, wasted |
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| (adjective) impaired by diminution | Synonyms: lessened, vitiated, weakened |
| (adjective) made to seem smaller or less (especially in worth) | Synonyms: belittled, small |
| (adjective) (of musical intervals) reduction by a semitone of any perfect or minor musical interval | - |
| diminishing | (adjective) becoming smaller or less or appearing to do so | - |
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| diminuendo | (adjective) (music) gradually decreasing in volume | Synonyms: decrescendo |
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| diminutive | (adjective) very small | Synonyms: bantam, flyspeck, lilliputian, midget, petite, tiny |
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| dimmed | (adjective) made dim or less bright | Synonyms: dim |
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| dimorphic | (adjective) occurring or existing in two different forms | Synonyms: dimorphous |
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| dimorphous | (adjective) occurring or existing in two different forms | Synonyms: dimorphic |
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| dingy | (adjective) causing dejection | Synonyms: blue, dark, disconsolate, dismal, drab, drear, dreary, gloomy, grim, sorry |
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| (adjective) thickly covered with ingrained dirt or soot | Synonyms: begrimed, grimy, grubby, grungy, raunchy |
| (adjective) (of color) discolored by impurities; not bright and clear | Synonyms: dirty, muddied, muddy |
| dinky | (adjective) (British informal) pretty and neat | - |
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| (adjective) small and unimpressive | Synonyms: insignificant |
| diocesan | (adjective) belonging to or governing a diocese | - |
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| dioecian | (adjective) having male and female reproductive organs in separate plants or animals | Synonyms: dioecious |
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| dioecious | (adjective) having male and female reproductive organs in separate plants or animals | Synonyms: dioecian |
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| dioestrous | (adjective) (of animals that have several estrous cycles in one breeding season) in a period of sexual inactivity | Synonyms: diestrous, diestrual, dioestrual |
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| dioestrual | (adjective) (of animals that have several estrous cycles in one breeding season) in a period of sexual inactivity | Synonyms: diestrous, diestrual, dioestrous |
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| diploid | (adjective) of a cell or organism having two sets of chromosomes or twice the haploid number | - |
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| diplomatic | (adjective) using or marked by tact in dealing with sensitive matters or people | Synonyms: diplomatical |
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| (adjective) relating to or characteristic of diplomacy | - |
| diplomatical | (adjective) using or marked by tact in dealing with sensitive matters or people | Synonyms: diplomatic |
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| dipolar | (adjective) having equal and opposite electric charges or magnetic poles having opposite signs and separated by a small distance | - |
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| dipped | (adjective) having abnormal sagging of the spine (especially in horses) | Synonyms: lordotic, swayback, swaybacked |
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| dipterous | (adjective) of or relating to or belonging to the Diptera | - |
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| dire | (adjective) fraught with extreme danger; nearly hopeless | Synonyms: desperate |
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| (adjective) causing fear or dread or terror | Synonyms: awful, direful, dread, dreaded, dreadful, fearful, fearsome, frightening, horrendous, horrific, terrible |
| direct | (adjective) direct in spatial dimensions; proceeding without deviation or interruption; straight and short | - |
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| (adjective) (of a current) flowing in one direction only | - |
| (adjective) straightforward in means or manner or behavior or language or action | - |
| (adjective) similar in nature or effect or relation to another quantity | - |
| (adjective) in a straight unbroken line of descent from parent to child | Synonyms: lineal |
| (adjective) moving from west to east on the celestial sphere; or--for planets--around the sun in the same direction as the Earth | - |
| (adjective) lacking compromising or mitigating elements | Synonyms: exact |
| (adjective) in precisely the same words used by a writer or speaker | Synonyms: verbatim |
| (adjective) having no intervening persons, agents, conditions | Synonyms: unmediated |
| (adjective) being an immediate result or consequence | - |
| directed | (adjective) manageable by a supervising agent | - |
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| (adjective) (often used in combination) having a specified direction | - |
| directing | (adjective) showing the way by conducting or leading; imposing direction on | Synonyms: directional, directive, guiding |
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| directional | (adjective) relating to or indicating directions in space | - |
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| (adjective) relating to direction toward a (nonspatial) goal | - |
| (adjective) showing the way by conducting or leading; imposing direction on | Synonyms: directing, directive, guiding |
| directionless | (adjective) aimlessly drifting | Synonyms: adrift, afloat, aimless, planless, rudderless, undirected |
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| directive | (adjective) showing the way by conducting or leading; imposing direction on | Synonyms: directing, directional, guiding |
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| direful | (adjective) causing fear or dread or terror | Synonyms: awful, dire, dread, dreaded, dreadful, fearful, fearsome, frightening, horrendous, horrific, terrible |
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| dirigible | (adjective) capable of being steered or directed | Synonyms: steerable |
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| dirt | (adjective) (of roads) not leveled or drained; unsuitable for all year travel | Synonyms: ungraded |
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| dirty | (adjective) soiled or likely to soil with dirt or grime | Synonyms: soiled, unclean |
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| (adjective) (of behavior or especially language) characterized by obscenity or indecency | - |
| (adjective) spreading pollution or contamination; especially radioactive contamination | Synonyms: contaminating |
| (adjective) unethical or dishonest | Synonyms: shoddy, sordid |
| (adjective) expressing or revealing hostility or dislike | - |
| (adjective) obtained illegally or by improper means | Synonyms: ill-gotten |
| (adjective) (of a manuscript) defaced with changes | Synonyms: foul, marked-up |
| (adjective) (of color) discolored by impurities; not bright and clear | Synonyms: dingy, muddied, muddy |
| (adjective) vile; despicable | Synonyms: filthy, lousy |
| (adjective) contaminated with infecting organisms | Synonyms: pestiferous |
| (adjective) unpleasantly stormy | - |
| (adjective) violating accepted standards or rules | Synonyms: cheating, foul, unsporting, unsportsmanlike |
| disabled | (adjective) the total or partial absence of a person's bodily or mental functions, including the absence of a part of a person's body | Synonyms: handicapped |
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| disabling | (adjective) depriving of legal right; rendering legally disqualified | Synonyms: disqualifying |
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| (adjective) that cripples or disables or incapacitates | Synonyms: crippling, incapacitating |
| disabused | (adjective) freed of a mistaken or misguided notion | Synonyms: undeceived |
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| disadvantaged | (adjective) marked by deprivation especially of the necessities of life or healthful environmental influences | Synonyms: deprived |
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| disadvantageous | (adjective) involving or creating circumstances detrimental to success or effectiveness | Synonyms: unfavorable, unfavourable |
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| disaffected | (adjective) discontented as toward authority | Synonyms: ill-affected, malcontent, rebellious |
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| disagreeable | (adjective) not to your liking | - |
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| (adjective) unpleasant to interact with | - |
| (adjective) not agreeing with your tastes or expectations | Synonyms: unsympathetic |
| disappointed | (adjective) disappointingly unsuccessful | Synonyms: defeated, discomfited, foiled, frustrated, thwarted |
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| disappointing | (adjective) not up to expectations | Synonyms: dissatisfactory, unsatisfying |
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