noun
A somewhat old-fashioned or literary word for anger or strong emotion, often implying a sudden or intense feeling. Not commonly used in modern everyday speech.
彼は向か腹を立てて、部屋を飛び出した。
He flew into a rage and stormed out of the room.
その知らせに、彼は向か腹が収まらなかった。
Upon hearing the news, he could not contain his anger.
怒り is the standard modern word for anger. 向か腹 is rarer and more literary, often suggesting a more passionate or sudden anger.
腹立ち is a common word for anger or irritation. 向か腹 is less common and has a more old-fashioned, intense nuance.
The exact derivation is uncertain. It may be related to 向か (muka, 'facing') and 腹 (hara, 'belly'), suggesting anger welling up from within, but this is speculative.