发愣 (fā lèng): Stare blankly / be dumbfounded (Verb) — Meaning & Stroke Order

Faced with the sudden sharp questioning, the representative was momentarily dumbfounded and failed to respond immediately.

Why did you suddenly stare blankly just now? Did you remember something important?

He did not become dumbfounded by this unexpected news; instead, he quickly formulated a response plan.