suspiciously

sus·pi·cious  (s-spshs)

adj.

1. Arousing or apt to arouse suspicion; questionable: suspicious behavior.

2. Tending to suspect; distrustful: a suspicious nature.

3. Expressing suspicion: a suspicious look.

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sus·picious·ly adv.

sus·picious·ness n.

Thesaurus

Adv.

1.

suspiciously - with suspicion; "she regarded the food suspiciously"