IPA: /səˈspɪʃəs/
KK: /səˈspɪʃəs/
Having a feeling that something is wrong or that someone cannot be trusted; feeling doubtful or distrustful about someone or something.
She gave him a suspicious look when he arrived late without explanation.
Suspicious → It is formed from "suspicere" (Latin, meaning to look up at or to suspect) and the suffix "-ious" (meaning full of). The word "suspicious" means full of suspicion or inclined to suspect something.
Think of looking up at something suspicious — the root "suspicere" means to suspect, and the suffix "-ious" indicates being full of that feeling.