perplex

v. 使...困惑,使...更复杂,使...为难

Faced with that dilemma, he was perplexed.

他面对进退两难的局面，不知如何是好。

When new math was introduced into schools, many parents were perplexed by it.

当学校开设新的数学课时，许多家长对此感到迷惑不解。