1 apprehensive, distrustful, doubtful, jealous, leery (slang) mistrustful, sceptical, suspecting, unbelieving, wary
2 dodgy (Brit., Austral., & N.Z. informal) doubtful, dubious, fishy (informal) funny, irregular, of doubtful honesty, open to doubt or misconstruction, queer, questionable, shady (informal) suspect
1 believing, credulous, gullible, open, trustful, trusting, unsuspecting, unsuspicious
2 above board, beyond suspicion, not open to question, open, straight, straightforward, unquestionable, upright
English Collins Dictionary - English synonyms & Thesaurus
1 adj If you are suspiciousof someone or something, you do not trust them, and are careful when dealing with them.
oft ADJ of n/-ing
He was rightly suspicious of meeting me until I reassured him I was not writing about him..., He has his father's suspicious nature.
suspiciously adj ADV after v
`What is it you want me to do?' Adams asked suspiciously.
2 adj If you are suspiciousof someone or something, you believe that they are probably involved in a crime or some dishonest activity.
oft ADJ of n
Two officers on patrol became suspicious of two men in a car..., A woman kept prisoner in a basement was rescued after suspicious neighbours tipped off police.
3 adj If you describe someone or something as suspicious, you mean that there is some aspect of them which makes you think that they are involved in a crime or a dishonest activity.
He reported that two suspicious-looking characters had approached Callendar...
suspiciously adv ADV with v, ADV adj/adv
They'll question them as to whether anyone was seen acting suspiciously in the area over the last few days..., Police were told to arrest voters found with suspiciously large sums of money in their pockets.
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