Convinced is an adjective that means persuaded or certain about something. Its antonyms include unconvinced, unsure, uncertain, doubtful, skeptical and dubious. Unconvinced means not persuaded or convinced about something, while unsure denotes uncertainty or lack of confidence in a decision or belief. Uncertain implies lack of clarity or firmness about something, while doubtful suggests skepticism or disbelief in something. Skeptical means inclined to doubt or question the validity of a claim, while dubious suggests hesitation or suspicion about something. Thus, the antonyms of convinced represent a spectrum of doubts, reservations or disbelief that people may have about a proposition or belief.