v. 25B6; verb PREOCCUPY, be uppermost in someone's mind, prey on someone's mind, prey on, possess, haunt, consume, plague, torment, hound, bedevil, beset, take control of, take over, have a hold on, eat up, grip.
OBSESS
Meaning of OBSESS in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012