adj. 25B6; adjective ALARMING, worrisome, daunting, perturbing, niggling, bothersome, troublesome, unsettling, nerve-racking; distressing, disquieting, upsetting, traumatic, problematic; informal scary, hairy.
WORRYING
Meaning of WORRYING in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012