细听

to listen carefully (for tiny sounds)

thin or slender / finely particulate / thin and soft / fine / delicate / trifling / (of a sound) quiet / frugal

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])

to prick up one's ear and listen carefully