onerous

Main Entry:
onerous [on-er-uhs, oh-ner-]
Part of Speech: adjective
Definition: difficult; requiring hard labor
Synonyms: arduous, austere, backbreaking, burdensome, crushing, cumbersome, demanding, difficult, distressing, embittering, exacting, excessive, exhausting, exigent, fatiguing, formidable, galling, grave, grinding, grueling, hard*, harsh, headache, heavy*, intolerable, irksome, laborious, merciless, oppressive, overpowering, overtaxing, painful, plodding, ponderous, pressing, responsible, rigorous, serious, severe, strenuous, taxing, tiresome, tiring, toilsome, troublesome, vexatious, weighty
Antonyms: common, easy, light, trivial
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: demanding
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: 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: exacting
Part of Speech: adjective
Definition: demanding
Synonyms: burdensome, by the book, careful, critical, difficult, exigent, finicky, fussy, grievous, hard, harsh, hypercritical, imperious, nit-picking, onerous, oppressive, painstaking, particular, persnickety, picky, precise, rigid, rigorous, severe, stern, strict, stringent, taxing, tough, trying, unsparing, weighty
Antonyms: giving, lending
Main Entry: exigent
Part of Speech: adjective
Definition: difficult, taxing
Synonyms: arduous, burdensome, demanding, exacting, grievous, hard, harsh, onerous, oppressive, rigorous, severe, stiff, strict, stringent, superincumbent, tough, weighty
Antonyms: easy, facile, unpressured
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: grievous
Part of Speech: adjective
Definition: severe, painful; serious
Synonyms: afflicting, agonizing, appalling, atrocious, calamitous, damaging, deplorable, dire, dismal, disquieting, distressing, disturbing, dreadful, egregious, flagrant, glaring, grave, harmful, heart-rending, heavy*, heinous, hurtful, injurious, intolerable, lamentable, monstrous, mournful, offensive, onerous, oppressive, outrageous, pathetic, pitiful, sad, shameful, sharp, shocking, sorrowful, taxing, tough, tragic, troublesome, unbearable, upsetting, villainous, weighty, wounding
Antonyms: good, harmless, pleasant
Main Entry: hard
Part of Speech: adjective
Definition: difficult, exhausting
Synonyms: Herculean, arduous, backbreaking, bothersome, burdensome, complicated, demanding, difficile, distressing, effortful, exacting, fatiguing, formidable, grinding, hairy*, heavy*, intricate, involved, irksome, knotty, labored, laborious, mean, merciless, murder, onerous, operose, rigorous, rough, rugged, scabrous, serious, severe, slavish, sticky, strenuous, terrible, tiring, toilful, toilsome, tough, troublesome, unsparing, uphill battle, uphill, wearing, wearisome, wearying
Antonyms: easy, facile, mild, simple
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