Where does “synthfuel” come from?

synthfuel (English) comes from English synthetic, from French synthétique, from Ancient Greek συνθετικός, from Ancient Greek σύνθεσις, from Ancient Greek συντίθημι, from Ancient Greek σῠν-, from Ancient Greek σύν, from Proto-Hellenic *ksún — beside, with.

Ancestry of “synthfuel”, step by step

synthfuel traces back through two separate lines of ancestry.

via English synthetic

StepLanguageWordMeaning
1EnglishsyntheticOf, or relating to synthesis; Produced by...
2Frenchsynthétiquesynthetic
3Ancient Greekσυνθετικόςskilled in putting together, constructive;...
4Ancient Greekσύνθεσιςa putting together, composition, combination,...
5Ancient Greekσυντίθημιto assemble, put together
6Ancient Greekσῠν-together; with, together
7Ancient Greekσύνbeside, with
8Proto-Hellenic*ksúnbeside, with

via English fuel

StepLanguageWordMeaning
1EnglishfuelSubstance consumed to provide energy through...
2Middle EnglishfuayleFuel; items to be burnt
3Old Frenchfouaillefirewood; torch
4Old Frenchfeufire
5Late Latinfocusfire
6Latinfocusfireplace, hearth; firepan, coal pan, brazier;...
Every word from Proto-Hellenic *ksúnEvery word from Ancient Greek σῠν-Every word from Ancient Greek συντίθημι