(bound form) to block or obstruct; to be hindered; used in formal compounds and idioms like 茅塞顿开 máo​sè​dùn​kāi

to fill or stuff in; to plug or stop up; to squeeze into a small space

(bound form) a stopper, cork, or plug

(bound form) a place of strategic importance; a stronghold or border pass

(bound form) to gloss over, evade, or perform a task perfunctorily as seen in 敷衍塞责 fū​yǎn​sè​zé

an abbreviation for 塞尔维亚 sài'ěr​wéi​yà

a Chinese surname

(literary) to fill or permeate