減速 [ㄐㄧㄢˇ ㄙㄨˋ; jian3 su4]
  to reduce speed
  to slow down
  to take it easy
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  減速
  げんそく
  noun (common) (futsuumeishi)
  noun or participle which takes the aux. verb suru
  nouns which may take the genitive case particle `no'
  antonym: 加速
  deceleration
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