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sustainer

The English word “sustainer” has 4 meanings listed here.

noun

  1. A person or thing that sustains.
  2. A rocket engine that remains with a spacecraft during its ascent after the separation of the booster engines.
  3. A person who makes regular donations, especially to a public radio or television station.
  4. A radio program without a commercial sponsor.

Etymology

From sustain + -er.

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Definitions are from Wiktionary, extracted by Kaikki.org, and are available under the CC BY-SA 4.0 licence.