a pin, such as a hairpin, tie pin, bowling pin, or golf pin

to use one's head

(literary) they (about women or girls)

use one thing for many purposes / work someone hard

U-turn

(chiefly Kansai) Synonym of 画鋲 (gabyō, “thumbtack; pushpin”)

安全ピン: a safety pin

an unfocused photograph, a misfocused image / an unfocused argument, unclear speech or writing

(photography) out of focus / (discourse, argument) unfocused, off the mark, unclear

Kyūjitai form of 粤拼 (“Jyutping”)