English
fuelbreak
From fuel + break.
Latin focus ‘hearth’
Late Latin focus ‘fire’
Old French feu ‘fire’
Old French fouaille ‘firewood’
Middle English fuayle ‘fuel’
English fuel
Proto-Indo-European *bʰreg- ‘to break’
…
Proto-Germanic *brekaną ‘to break’
Proto-West Germanic *brekan ‘to break’
Old English brecan ‘to break’
Middle English breken ‘to break up or split’
English break
Today it means
noun A point where a natural or artificial change in fuel characteristics reduces the spread of a fire.
Language periods are conventional ranges, not dates for this word.
Etymograph / fuelbreak