suspicious Definition

suspicious
adj

1. Inclined to suspect guilt, wrongdoing, etc.

Example: has a very suspicious nature
Thesaurus: suspecting, jealous, doubting, uneasy, wary, leery, skeptical; Antonym: trusting.
2. Inviting or arousing suspicion; dubious.

Example: found the body in suspicious circumstances
Thesaurus: shady, questionable, queer, suspect, irregular, peculiar, equivocal, debatable, specious, fishy; Antonym: innocent.

Derivative: suspiciously
adverb

Derivative: suspiciousness
noun

Etymology: 14c: from French suspecious, from Latin suspicio suspicion.