v. 25B6; verb WORRY, fret, fuss, brood, upset oneself, rack one's brains, wrestle with oneself, be worried/anxious, feel uneasy, exercise oneself; informal stew; archaic pore on.
AGONIZE
Meaning of AGONIZE in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012