Clenched Fist
Knuckles
noun, verbal noun
げんこつ
A Clenched Fist 拳骨 will expose your fist 拳 bones 骨 (Knuckles).
Genji げん has to Kotzen こつ (puke in German) when he sees Knuckles.
The pain was so bad Genji げん Clenched his Fists and shtarted zu Kotzen こつ (puke in German).