岩のように硬いものが同じように硬いものに当たる音。重い音。
The sound of something as hard as a rock hitting something equally hard. A heavy sound.
頭に拳骨を落とされる場面でよく見る。
Often seen when a fist bone is dropped on the head to scold a subordinate or a younger one.
活用形 - Conjugation
ごつん（ゴツン）
