spar·er /ˈspɛrɚ/ 名詞
 節省物質


 Spar·er n. One who spares.

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 Spare, a. [Compar. Sparer superl. Sparest; -- not used in all the senses of the word.]
 1. Scanty; not abundant or plentiful; as, a spare diet.
 2. Sparing; frugal; parsimonious; chary.
    He was spare, but discreet of speech.   --Carew.
 3. Being over and above what is necessary, or what must be used or reserved; not wanted, or not used; superfluous; as, I have no spare time.
    If that no spare clothes he had to give.   --Spenser.
 4. Held in reserve, to be used in an emergency; as, a spare anchor; a spare bed or room.
 5. Lean; wanting flesh; meager; thin; gaunt.
    O, give me the spare men, and spare me the great ones.   --Shak.
 6. Slow. [Obs. or prov. Eng.]


 sparer
      n : someone who refrains from injuring or destroying