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fuel

/ˈfjuːəl/ noun B1
  1. Substance consumed to provide energy through combustion, or through chemical or nuclear reaction. (countable, uncountable)
  2. Substance that provides nourishment for a living organism; food. (countable, uncountable)
  3. Something that stimulates, encourages or maintains an action. (countable, figuratively, uncountable) · His books were fuel for the revolution.· Money is the fuel for economy.

Plural fuels

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Phrasal verbs and expressions

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Researchers emphasize that harsh self-criticism is entirely counterproductive, as it only generates more negative emotions that fuel further procrastination.
The Emotional Roots of Procrastination, p. 1 · C1

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Words, meanings, pronunciations and translations from Wiktionary (CC BY-SA 4.0); how common each word is from wordfreq. Made into this dictionary by FluentPlex.