sāi

to plug; to stop up; to stuff in; (bound form) a stopper; a cork

Watch it being written

Every character draws itself, stroke by stroke. Then grab the brush: trace it yourself and hear the word when you finish.

See it in sentences

他把耳朵塞住。

He plugged his ears.

箱子里塞满了衣服。

The suitcase is stuffed with clothes.