退役 [ㄊㄨㄟˋ ㄧˋ; tui4 yi4]
  to retire from the military
  to demobilize
  to decommission
  retired from use
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  退役
  たいえき
  noun (common) (futsuumeishi)
  noun or participle which takes the aux. verb suru
  nouns which may take the genitive case particle `no'
  retiring from military service
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