English
synfuel
Blend of synthetic + fuel.
Proto-Indo-European *dʰeh₁- ‘to do’
Ancient Greek σῠντῐ́θημῐ
Ancient Greek σύνθεσις ‘putting together’
Ancient Greek συνθετικός ‘skilled in putting together, constructive’
French synthétique
English synthetic
Latin focus ‘hearth’
Late Latin focus ‘fire’
Old French feu ‘fire’
Old French fouaille ‘firewood’
Middle English fuayle ‘fuel’
English fuel
Today it means
noun Any of several fuels synthesized from coal or shale etc, or fermented from grain etc.
Language periods are conventional ranges, not dates for this word.
Etymograph / synfuel