Webster's 1828 Dictionary
EXHAUSTING
ppr. Drawing out; draining off; emptying; using or expending the whole; consuming. 1. Tending to exhaust; as exhausting labor.
Webster's 1913 Dictionary
EXHAUSTING
EXHAUSTING Ex *haust "ing, a.
Defn: Producing exhaustion; as, exhausting labors. -- Ex *haust "ing, adv.
New American Oxford Dictionary
exhausting
ex haust ing |igˈzôstiNG ɪɡˈzɔːstɪŋ | ▶adjective making one feel very tired; very tiring: a long and exhausting journey. DERIVATIVES ex haust ing ly adverb
Oxford Dictionary
exhausting
exhausting |ɪgˈzɔːstɪŋ, ɛg- | ▶adjective making one feel very tired; very tiring: a long and exhausting journey. DERIVATIVES exhaustingly adverb
American Oxford Thesaurus
exhausting
exhausting adjective an exhausting day of moving furniture: tiring, wearying, taxing, fatiguing, wearing, enervating, draining; arduous, strenuous, onerous, demanding, grueling; informal killing, murderous.
Oxford Thesaurus
exhausting
exhausting adjective a long and exhausting journey: tiring, wearying, taxing, fatiguing, wearing, enervating, draining, sapping, debilitating; arduous, strenuous, uphill, onerous, punishing, demanding, exacting, burdensome, gruelling, back-breaking, crushing, crippling; informal killing, murderous, hellish; Brit. informal knackering; rare exigent. ANTONYMS invigorating, refreshing.
Sanseido Wisdom Dictionary
exhausting
ex h á ust ing 形容詞 〈仕事 日などが 〉疲労させる, へとへとにさせる ▸ an exhausting process [schedule ]ひどく疲れる過程 [日程 ]