1. (a.) Inclined to suspect; given or prone to suspicion; apt to imagine without proof.

2. (a.) Indicating suspicion, mistrust, or fear.

3. (a.) Liable to suspicion; adapted to raise suspicion; giving reason to imagine ill; questionable; as, an author of suspicious innovations; suspicious circumstances.

Pyrrhonic a bit thick a bit thin absurd agnostic amoral apprehensive arguable at issue beyond belief borderline cagey careful cautious chary confutable conjectural conscienceless contestable controversial controvertible corrupt corrupted criminal crooked dark debatable deniable devious disbelieving dishonest dishonorable disinclined to believe disposed to doubt disputable distrustful distrustfully doubtable doubtful doubtfully doubting dubious dubitable envious evasive felonious fishy fraudulent from Missouri green green with jealousy green-eyed guarded hard of belief hard to believe horn-mad iffy ill-got ill-gotten immoral impervious to persuasion implausible in dispute in doubt in dubio in question inconceivable inconvincible incredible incredulous indirect insidious invidious jaundice-eyed jaundiced jealous leery mistakable mistrustful mistrusting moot not deserving belief not kosher open open to doubt open to question open to suspicion passing belief preposterous problematic queer questionable questioning refutable ridiculous rotten sceptical scrupulous shady shaky shameless shifty shy shy of belief sinister skeptical skeptically slippery speculative staggering belief suppositional suspect suspected suspecting suspiciously tall thick thin tricky unbelievable unbelieving uncertain unconscienced unconscientious unconscionable unconvincible unconvincing uncredulous under suspicion underhand underhanded unearthly uneasy unethical ungodly unimaginable unpersuadable unpersuasible unprincipled unsavory unscrupulous unstraightforward unsure unthinkable untrusting unwilling to accept unworthy of belief wary watchful without remorse without shame yellow yellow-eyed