へなへな
  adverb (fukushi)
  adverb taking the `to' particle
  noun or participle which takes the aux. verb suru
  onomatopoeic or mimetic word
  weakly
  helplessly
  nouns which may take the genitive case particle `no'
  adjectival nouns or quasi-adjectives (keiyodoshi)
  weak
  flimsy
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