听其自便

to allow sb to do sth at his convenience

smile (archaic)

(literary pronunciation, still advocated in Taiwan) to rule / to sentence / to allow

to listen to; to hear / to heed; to obey / a can (loanword from English "tin") / classifier for canned beverages / to let be; to allow (Taiwan pr. [ting4]) / (literary) to administer; to deal with (Taiwan pr. [ting4])

self / oneself / from / since / naturally / surely

his / her / its / their / that / such / it (refers to sth preceding it)

plain / informal / suitable / convenient / opportune / to urinate or defecate / equivalent to 就[jiu4]: then / in that case / even if / soon afterwards

used in 便宜|便宜[pian2 yi5] / used in 便便[pian2 pian2] / used in 便嬛[pian2 xuan1]

to do as one pleases / to not inconvenience oneself