con·ve·nien·cy /-jən(t)si/
  便利;便宜;便利品
  Con·ven·ience Con·ven·ien·cy, n.
  1. The state or quality of being convenient; fitness or suitableness, as of place, time, etc.; propriety.
  Let's further think of this;
  Weigh what convenience both of time and means
  May fit us to our shape.   --Shak.
  With all brief and plain conveniency,
  Let me have judgment.   --Shak.
  2. Freedom from discomfort, difficulty, or trouble; commodiousness; ease; accommodation.
  Thus necessity invented stools,
  Convenience next suggested elbow chairs.   --Cowper.
     We are rather intent upon the end of God's glory than our own conveniency.   --Jer. Taylor.
  3. That which is convenient; that which promotes comfort or advantage; that which is suited to one's wants; an accommodation.
     A pair of spectacles and several other little conveniences.   --Swift.
  4. A convenient or fit time; opportunity; as, to do something at one's convenience.
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