adjective
1.
Synonyms: doubtful 1, borderline, doubtable, dubious, open, problematic, shaky, suspect, uncertain, unsure
Related Word: questionable; queer
2.
given or prone to suspicion
was suspicious of everyone's motives
Synonyms: distrustful, jealous, mistrustful
Related Word: careful, cautious; leery, wary, watchful; skeptical, unbelieving
Contrasted words: trustful, trusting, unsuspecting; naive; dupable, easy, exploitable, gullible
Antonyms: unsuspicious