fun-fun
Soft humming sounds while listening or thinking. Shows engagement in a conversation without interrupting.
💡Listening to a colleague's idea — 'She went fun-fun, nodding along thoughtfully.'
ふんふんとうなずきながら聞いている。
She's listening while going fun-fun and nodding.
The doctor listened ___ as I described my symptoms.
医者は○○とうなずきながら症状を聞いていた。