This is the 7010th most frequent Japanese word.
ムン
"ムン" is a transliteration of "Moon" or can represent a sound or name, depending on the context.
The word 'ムン' imitates the soft glowing of the moon in this context.
月がムンと光る夜でした。
It was a night when the moon shone softly.
Here, 'ムン' describes the cat's calm and collected posture.
猫はムンと椅子に座っていました。
The cat was sitting coolly on the chair.
In this sentence, 'ムン' conveys the impactful and solemn effect of his words.