Where does “Nachtspeicherofen” come from?

Nachtspeicherofen (German) comes from German Speicher, from Middle High German spīcher, from Old High German spīhhāri, from Proto-West Germanic spīkārī, from Latin spicarium, from Latin -ārium, from Latin -um, from Proto-Italic *-om.

Ancestry of “Nachtspeicherofen”, step by step

Nachtspeicherofen traces back through 3 separate lines of ancestry.

via German Speicher

StepLanguageWordMeaning
1GermanSpeichergranary; storage room in the attic; memory
2Middle High Germanspīcher
3Old High Germanspīhhāri
4Proto-West Germanicspīkārīgranary
5Latinspicariumgranary
6Latin-āriumused primarily to form nouns of purpose from other nouns, such as places where things are kept or objects used for a particular end
7Latin-umnominative neuter singular of -us; accusative...
8Proto-Italic*-om
9Proto-Indo-European*-oHom

via German nacht

StepLanguageWordMeaning
1Germannachtnight
2Middle High Germannahtnight
3Old High Germannahtnight
4Proto-West Germanicnahtnight
5Proto-Germanicnahtsnight
6Proto-Indo-Europeannókʷtsnight
7Proto-Indo-Europeannegʷ-bare, naked

via German ofen

StepLanguageWordMeaning
1Germanofenstove
2Middle High Germanovenoven
3Old High Germanofanoven
4Proto-West Germanicofnoven
5Proto-Germanicuhnazoven; furnace
6Proto-Indo-Europeanaukw-cooking pot
Every word from Proto-Indo-European *-oHom