adj. 25B6; adjective
she gave him a suspicious look : DOUBTFUL, unsure, dubious, wary, chary, sceptical, distrustful, mistrustful, disbelieving, cynical.
a highly suspicious character : DISREPUTABLE, unsavoury, dubious, suspect, dishonest-looking, funny-looking, slippery; informal shifty, shady; Brit. informal dodgy.
she disappeared in suspicious circumstances : QUESTIONABLE, odd, strange, dubious, irregular, queer, funny, doubtful, mysterious, murky; informal fishy; Brit. informal dodgy.
trusting, honest, innocent.