被約
  ひやく
  adjectival nouns or quasi-adjectives (keiyodoshi)
  mathematics
  reduced
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  秘鑰
  ひやく
  noun (common) (futsuumeishi)
  secret key
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  秘薬
  ひやく
  noun (common) (futsuumeishi)
  nostrum
  secret medicine
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  飛躍
  ひやく
  noun (common) (futsuumeishi)
  noun or participle which takes the aux. verb suru
  leaping
  activity
  leapfrog (over a problem)
  making a leap (e.g. in logic)
  making great strides
  making rapid progress
  emerging
  becoming active
  playing an active part
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