in a way that shows you think someone has done something wrong or dishonest:
Meg looked at me suspiciously.
'What do you want it for?' he asked suspiciously.
in a way that makes people think that something bad or illegal is happening:
He saw two youths acting suspiciously.
He seemed to be taking a suspiciously long time.
This sounded suspiciously like an attempt to get rid of me.
in a way that shows you do not trust something or someone:
They eyed the food suspiciously.