| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | challenging, urgent |
| Synonyms: | ambitious, backbreaker, bothersome, clamorous, critical, dictatorial, difficult, exacting, exhausting, exigent, fussy, grievous, hard, imperious, importunate, insistent, nagging, onerous, oppressive, pressing, querulous, strict, stringent, taxing, tough, troublesome, trying, wearing, weighty |
| Antonyms: | easy, facile, trivial, unchallenging, undemanding |
| Main Entry: | demand |
| Part of Speech: | verb |
| Definition: | require |
| Synonyms: | ask, call for, command, crave, cry out for, fail, involve, lack, necessitate, need, oblige, take, want |
| Antonyms: | give, present, supply |
| Main Entry: | acquisitive |
| Part of Speech: | adjective |
| Definition: | eager to obtain knowledge or things |
| Synonyms: | avaricious, avid, covetous, demanding, desirous, grabbing, grabby, grasping, greedy, predatory, prehensile, rapacious |
| Main Entry: | ambitious |
| Part of Speech: | adjective |
| Definition: | requiring great effort, ability |
| Synonyms: | arduous, bold, challenging, demanding, difficult, elaborate, energetic, exacting, formidable, grandiose, hard, impressive, industrious, lofty, pretentious, severe, strenuous, visionary |
| Antonyms: | easy, facile |
| Main Entry: | assertive |
| Part of Speech: | adjective |
| Definition: | aggressive |
| Synonyms: | absolute, assured, certain, confident, decided, decisive, demanding, dogmatic, domineering, emphatic, firm, forceful, forward, insistent, militant, overbearing, positive, pushy, self-assured, self-confident, strong-willed, sure |
| Antonyms: | diffident, quiet, shy, unconfident |
| Main Entry: | burdensome |
| Part of Speech: | adjective |
| Definition: | troublesome |
| Synonyms: | carking, crushing, demanding, difficult, disturbing, exacting, exigent, heavy*, irksome, onerous, oppressive, superincumbent, taxing, tough, trying, wearing, wearying, weighty |
| Antonyms: | aiding, helpful, helping, relieving, unburdensome |
| Main Entry: | captious |
| Part of Speech: | adjective |
| Definition: | very critical |
| Synonyms: | acrimonious, cantankerous, carping, caviling, cavillous, censorious, contrary, crabby, cross, demanding, deprecating, disparaging, exacting, exceptive, fault-finding, finicky, hypercritical, irritable, nagging, nit-picking, overcritical, peevish, perverse, petulant, sarcastic, severe, testy, touchy |
| Antonyms: | commendatory, complimentary, encouraging, flattering, laudatory, praising |
| Main Entry: | challenge |
| Part of Speech: | noun |
| Definition: | dispute, question |
| Synonyms: | claiming, confrontation, dare, defiance, demanding, demur, interrogation, objection, protest, provocation, remonstrance, summons to contest, test, threat, trial, ultimatum |
| Antonyms: | agree, answer, decide, win |
| Main Entry: | critical |
| Part of Speech: | adjective |
| Definition: | fault-finding, detracting |
| Synonyms: | analytical, belittling, biting, calumniatory, captious, carping, caviling, cavillous, censorious, censuring, choleric, condemning, critic, cutting, cynical, demanding, demeaning, derogatory, diagnostic, disapproving, discerning, discriminating, disparaging, exacting, exceptive, finicky, fussy, hairsplitting, humbling, hypercritical, lowering, nagging, niggling, nit-picking, overcritical, particular, penetrating, reproachful, sarcastic, satirical, scolding, severe, sharp, trenchant, withering |
| Antonyms: | complimentary, laudatory, praising |