| Main Entry: | |
| 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: | difficult |
| Part of Speech: | adjective |
| Definition: | hard on someone; hard to do |
| Synonyms: | Gargantuan, Herculean, ambitious, arduous, backbreaker, bothersome, burdensome, challenging, crucial, demanding, difficile, easier said than done, effortful, exacting, formidable, galling, hard-won, heavy, immense, intricate, irritating, labored, laborious, no picnic, not easy, onerous, operose, painful, problem, problematic, prohibitive, rigid, severe, stiff, strenuous, titanic, toilsome, tough, troublesome, trying, unyielding, uphill, upstream, wearisome |
| Antonyms: | calm, easy, free, manageable, plain, simple, uncomplicated |
| Main Entry: | formidable |
| Part of Speech: | adjective |
| Definition: | difficult, overwhelming |
| Synonyms: | all-powerful, arduous, awesome, ballbuster, challenging, colossal, dismaying, effortful, great, hard, impressive, indomitable, intimidating, labored, laborious, mammoth, mighty, murder*, onerous, overpowering, powerful, puissant, rough go, rough*, staggering, strenuous, tall order, toilsome, tough proposition, tough*, tremendous, uphill |
| Antonyms: | easy, not hard, pleasant, trivial |
| Main Entry: | inquisitive |
| Part of Speech: | adjective |
| Definition: | curious |
| Synonyms: | analytical, big-eyed, challenging, forward, impertinent, inquiring, inquisitorial, interested, intrusive, investigative, meddlesome, meddling, nosy, peering, personal, poking, presumptuous, probing, prying, questioning, scrutinizing, searching, sifting, snooping, speculative |
| Antonyms: | incurious, indifferent, unconcerned, uninterested |
| Main Entry: | provocative |
| Part of Speech: | adjective |
| Definition: | aggravating |
| Synonyms: | annoying, challenging, disturbing, exciting, galling, goading, heady, incensing, inciting, influential, inspirational, insulting, intoxicating, offensive, outrageous, provoking, pushing, spurring, stimulant, stimulating |
| Antonyms: | repressive, suppressive, unprovocative |
| Main Entry: | stimulating |
| Part of Speech: | adjective |
| Definition: | exciting |
| Synonyms: | adrenalizing, appealing, arousing, bracing, breathtaking, challenging, electrifying, energizing, exhilarating, gripping, hair-raising, hectic, inspiring, interesting, invigorating, lively, moving, provocative, rousing, spine-tingling, stirring, thought-provoking, thrilling, titillating |
| Main Entry: | quickening |
| Part of Speech: | adjective |
| Definition: | stimulating |
| Synonyms: | adrenalizing, animating, appealing, arousing, bracing, breathtaking, challenging, electrifying, energizing, enlivening, exhilarating, gripping, hair-raising, hectic, inspiring, interesting, invigorating, lively, moving, provocative, rousing, spine-tingling, stirring, thought-provoking, thrilling, titillating, vitalizing, vivifying |
| Main Entry: | reinvigorating |
| Part of Speech: | adjective |
| Definition: | tonic |
| Synonyms: | adrenalizing, appealing, arousing, bracing, breathtaking, challenging, electrifying, energizing, exhilarant, exhilarating, gripping, hair-raising, hectic, innerving, inspiring, interesting, intoxicating, invigorating, lively, moving, provocative, refreshing, renewing, restorative, roborant, rousing, spine-tingling, stimulating, stirring, thought-provoking, thrilling, titillating |
| Main Entry: | renewing |
| Part of Speech: | adjective |
| Definition: | tonic |
| Synonyms: | adrenalizing, appealing, arousing, bracing, breathtaking, challenging, electrifying, energizing, exhilarant, exhilarating, gripping, hair-raising, hectic, innerving, inspiring, interesting, intoxicating, invigorating, lively, moving, provocative, refreshing, reinvigorating, restorative, roborant, rousing, spine-tingling, stimulating, stirring, thought-provoking, thrilling, titillating |