ぺこぺこ
  adjectival nouns or quasi-adjectives (keiyodoshi)
  onomatopoeic or mimetic word
  very hungry
  starving
  famished
  adverb taking the `to' particle
  adverb (fukushi)
  noun or participle which takes the aux. verb suru
  see: ぺこん・2
  onomatopoeic or mimetic word
  fawning
  bowing and scraping
  being obsequious
  being servile
  kowtowing
  bowing repeatedly
  cringing
  see: ぺこん・1
  onomatopoeic or mimetic word
  giving in
  being dented
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