adj. 25B6; adjective EXCRUCIATING, harrowing, racking, searing, extremely painful, acute, severe, torturous, tormenting, piercing; informal hellish, killing; formal grievous.
AGONIZING
Meaning of AGONIZING in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012