"Dubious" is a word that describe something or someone that is uncertain, doubtful, questionable, or ambiguous. There are several synonyms of this word that can be used interchangeably in different contexts. Some of the synonyms for "dubious" include: hesitant, skeptical, unsure, suspicious, undecided, uncertain, wary, mistrustful, ambivalent, and iffy. These synonyms can be used to describe a person's feelings, intentions, actions, beliefs, or circumstances that are uncertain or doubtful. Choosing the right synonym for "dubious" can add nuance and clarity to your writing or conversation and help convey your intended meaning more effectively.