verb (v)

• use cautiously and frugally(verb.possession)

  Example:
  I try to economize my spare time.
  

  Synonym:
  conserve, economise, husband
  Antonym:
  blow, squander, waste
  

  source: wordnet30
• spend sparingly, avoid the waste of(verb.possession)

  Example:
  The less fortunate will have to economize now.
  

  Synonym:
  economise, save
  

  source: wordnet30
• To manage with economy; to use with prudence; to expend with frugality; as, to economize one's income.(verb)

  source: webster1913
• To be prudently sparing in expenditure; to be frugal and saving; as, to economize in order to grow rich.(verb)

  source: webster1913