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