interjection
Expresses mild surprise or doubt, often with a thoughtful or questioning tone.
むむ、それは本当かな?
Hmm, is that really true?
interjection
Used when pondering or thinking deeply, often with a prolonged sound.
むむ…どうしたらいいだろう。
Mm... what should I do?
interjection
Used to call attention or preface a statement, similar to 'well' or 'hey' in English.
むむ、ちょっと聞いてくれ。
Hey, listen to me for a second.