tending to cause or excite suspicion; questionable

suspicious behavior.

inclined to suspect, esp. inclined to suspect evil; distrustful

a suspicious tyrant.

full of or feeling suspicion.

expressing or indicating suspicion

a suspicious glance.

adjective

innocent , trustworthy , trusty , believable , indubious , palpable , undoubted , unquestionable

adjective

apprehensive , cagey , careful , cautious , doubtful , green-eyed * , incredulous , in doubt , jealous , leery , mistrustful , not born yesterday* on the lookout , questioning , quizzical , skeptical , suspect , suspecting , unbelieving , uptight * , wary , watchful , without belief , without faith , wondering , borderline , debatable , different , disputable , doubtable , dubious , equivocal , farfetched , funny * , irregular , not kosher , open , open to doubt , open to question , out of line , overt , peculiar , phony , problematic , queer , questionable , reaching , rings untrue , shady , shaky * , too much * , uncertain , uncommon , unsure , unusual , won’t wash , doubting , untrusting , accusatory , askance , distrustful , furtive , incriminatory , paranoid , querulant , shaky , umbrageous