She wore a mystified expression as she tried to understand the complex instructions.
mystified look
Frequency:
65
%
He gave her a mystified look when she asked him a difficult question.
mystified by
Frequency:
60
%
The students were mystified by the sudden change in the exam schedule.
Idiomatic Expressions for mystified
Phrase: Mystified look
Meaning: A confused or puzzled expression on someone's face
Usage: He had a mystified look on his face when he couldn't find his keys.