suspicious
sus-pi-cious
adjective
Feeling or showing a lack of trust in someone or something.
"She was suspicious of his sudden generosity."
adjective
Causing a feeling that something is wrong, dishonest, or dangerous.
"Police found a suspicious package near the station."
Thesaurus
Synonyms: distrustful, untrusting, leery, wary, mistrustful, questionable, fishy, funny, suspect, shady