fuel
noun
combustible matter used to maintain fire, as coal, wood, oil, or gas, in order to create heat or power.
had been fueling
-
past perfect progressiveof fuel.past perfect progressive
Used to describe an action that was ongoing continuously in the past up until another past event interrupted it.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
What had been fueling the gains was an emerging idea that the smarter AI gets the more people would need ways to protect themselves from hacks.
From MarketWatch ● May 27, 2026
“Officials said the gas valve that had been fueling the blaze has been shut off and the tank involved in the explosion has been isolated,” the Associated Press reports.
From Washington Post ● Jun. 24, 2019
