丢三落四diū sān là sì

HSK Level 6

forgetful

He is often forgetful, and today he forgot to bring his keys again.

He's been under a lot of work pressure lately and is always forgetful, almost missing important meetings.

Given the frequent occurrences of forgetfulness on your part recently, it is recommended that you establish a comprehensive document management system.

Xiaoming is always scatterbrained when doing things, either forgetting his homework or losing his stationery.

Have you been too tired lately? Why have you started being forgetful again?

She is not consistently forgetful; it only happens when she is dealing with unfamiliar matters.

Although she is smart and capable, she can sometimes be forgetful, such as leaving important documents at the office yesterday.