noun

1. any material, as coal, oil, gas, wood, etc., burned to supply heat or power
2. fissile material from which nuclear energy can be obtained, as in a nuclear reactor
3. anything that maintains or intensifies strong feeling, etc.

Etymology: ME fewell < OFr fouaille < ML fuale, focale < foca, hearth, for L focus, fireplace: see focus

transitive verb fueled fu′eled or fuelled fu′elled, fueling fu′el·ing or fuelling fu′el·ling

intransitive verb