ni̍h-kûn-thâu-bú捏拳頭母

to clench one's fist

to clench one's fist; to make a fist

English Wiktionary, “捏拳頭母” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E6%8D%8F%E6%8B%B3%E9%A0%AD%E6%AF%8D · confidence: Medium (Wiktionary)