Collocations for bewildered - adj.

be, feel, look, seem, sound
become
leave sb
She packed her bags and left—leaving Matthew bewildered and confused.

very
completely, quite, thoroughly, totally, utterly
rather, somewhat
a little, slightly, etc.

at
He was rather bewildered at seeing her there.

by
She was totally bewildered by his message.

Bewildered is used with these nouns:
expression, look