Where does “holocausting” come from?

holocausting (English) comes from English Holocaust, from French holocauste, from Middle French holocauste, from Old French olocauste, from Latin holocaustum, from Ancient Greek ὁλόκαυστος, from Ancient Greek ὅλος, from Proto-Indo-European solh₂wós — mercy, comfort; comfort, mercy.

Ancestry of “holocausting”, step by step

holocausting traces back through two separate lines of ancestry.

via English Holocaust

StepLanguageWordMeaning
1EnglishHolocaustAlternative letter-case form of holocaust
2Frenchholocausteholocaust
3Middle Frenchholocauste
4Old Frencholocauste
5Latinholocaustuma burnt offering wholly consumed by fire;...
6Ancient Greekὁλόκαυστοςwholly burnt
7Ancient Greekὅλοςwhole, entire, perfect, complete; absolute,...
8Proto-Indo-Europeansolh₂wós
9Proto-Indo-Europeansōlh₂-mercy, comfort; comfort, mercy

via English ing

StepLanguageWordMeaning
1EnglishingA meadow, especially a low meadow near a river;...
2Middle Englishing
3Old Englishingmeadow, water meadow, ing
4Old Norseengmeadow
5Proto-GermanicangijōA low lying meadow in a valley or near a river
6Proto-Indo-Europeanh₂énkoscurve, bend
7Proto-Indo-European-osCreates action nouns or result nouns from verbs;...
Every word from Proto-Indo-European sōlh₂-
holocausting — Etymology, Origin & Word History | Etymology Explorer