ぶんぶん

ぶんぶん
adverb, onomatopoeia
buzzing
1. buzzing; humming
The sound of flying insects (especially bees) or things spinning/swinging rapidly.
(はち)がぶんぶん()んでいる。
A bee is buzzing around.
扇風機(せんぷうき)がぶんぶん(まわ)っている。
The fan is whirring.
(あたま)をぶんぶん()る。
To shake one's head vigorously.

ぶんぶん is an onomatopoeia imitating a continuous buzzing or whirring sound. The voiced "ぶ" conveys vibration and resonance.

TWO MAIN USES:
1. Sound: the buzzing of insects, whirring of fans or motors
2. Motion: vigorous swinging or shaking (head, arms, bat)

COMMON COLLOCATIONS:

  • ぶんぶん()ぶ: to fly around buzzing
  • ぶんぶん(まわ)る: to spin/whir
  • ぶんぶん()る: to swing/shake vigorously
  • (あたま)をぶんぶん()る: to shake one's head (emphatically, in denial)

RELATED ONOMATOPOEIA:

  • ブーン: a single sustained buzzing sound (a lone fly, an engine)
  • ブンブン: sometimes written in katakana for emphasis
  • ぶうぶう: grumbling/complaining; also pig oinking

REGISTER:
Casual and vivid. Common in children's speech, storytelling, and manga.

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