let on
片語動詞所屬單字let
let on — 片語動詞
1. To reveal a secret or show that you know something.
1.片語動詞
釋義
洩露（秘密）
To reveal a secret or show that you know something.
例句
She knew about the surprise but didn't let on.
Don't let on that I told you about the party.