feign

He tried to feign surprise when they threw him the secret party, even though he had already known about it.

(Chinese) 尽管他早已知情，但当他们为他举办秘密派对时，他还是努力假装很惊讶。

The soldier attempted to feign illness to avoid going back to the front lines.

(Chinese) 士兵试图装病以避免回到前线。