呆 (dāi): คนโง่

He stared blankly at the screen for a long time, not even noticing when his boss walked up behind him.

This math problem is too difficult. I stared at it blankly for ten minutes and still didn't know how to start.

Stop spacing out and help me move this box. It's too heavy.

Hearing the good news, he was completely stunned and couldn't say a word for a long time.