adj. 25B6; adjective DUBIOUS, doubtful, taking something with a pinch of salt, doubting; cynical, distrustful, mistrustful, suspicious, disbelieving, unconvinced, incredulous, scoffing; pessimistic, defeatist.
certain, convinced.
SCEPTICAL
Meaning of SCEPTICAL in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012