sustain - definition and synonyms

verb [transitive] 

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present tense
present participlesustaining
past tensesustained
past participlesustained
  1. 1
    to provide the conditions in which something can happen or exist

    Only two of the planets could sustain life.

  2. 2
    formal to give someone strength, energy, or hope

    A cup of coffee isn’t enough to sustain you until lunchtime.

    Throughout the trial he was sustained by the support of his family.

  3. 3
    formal to support or prove an idea, statement, theory etc
    1. a.
      legal to agree that a decision, law etc is based on good legal principles