Part of speech: verb

To uphold, as a weight; keep up; encourage; support; maintain.

Part of speech: verb

To endure; suffer.

Part of speech: verb

To establish; prove.

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Usage examples "sustain":

  1. You surely would not dare say what you have, unless certain my father would sustain you. - "Love Under Fire", Randall Parrish.
  2. Necessary as this measure is to sustain the honor and the interests of the country engaged in a foreign war, it is not doubted but that Congress will promptly authorize it. - "Complete State of the Union Addresses from 1790 to the Present", Various.
  3. But don't you need any outside element to sustain life? - "The Giants From Outer Space", Geoff St. Reynard.