Refers to a clenched hand. Often used in the context of a fist bump or a punch, such as 拳固を固める (to clench one's fist) or 拳固で殴る (to punch with a fist).
He clenched his fist in anger.
子供たちは拳固で遊びながら喧嘩した。
The children fought playfully with their fists.
Standard kanji spelling for this word.
Kana spelling is common in everyday writing, especially when the kanji is not important.
A shortened form of 拳骨 “fist,” with loss of the final つ.