adj. 25B6; adjective TIRING, wearying, taxing, fatiguing, wearing, enervating, draining; arduous, strenuous, onerous, demanding, gruelling; informal killing, murderous; Brit. informal knackering.
EXHAUSTING
Meaning of EXHAUSTING in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012