=1

塞

sāi

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

=1

塞

sài

(bound form) strategic stronghold

=1

塞

sè

(bound form) to block; to obstruct

2

勒

lè

(literary) bridle; halter; headstall to rein in to compel; to force (literary) to carve; to engrave (literary) to command; to lead (an army etc) (physics) lux (abbr. for 勒克斯 lèkèsī)

3

姆

mǔ

(old) female tutor used in 保姆 bǎomǔ