Entry
  1. Adverb (fukushi), Adverb taking the 'to' particle

    buzz; hum

    Onomatopoeic or mimetic word

    蜂が1ぴきぶんぶんいっている。
    A bee is buzzing.
  2. shake (with vigor); shaking

    Onomatopoeic or mimetic word

Also written ブンブン

Pitch on OJAD