Where does “oast house” come from?

oast house (English) comes from English oast, from Middle English ost, from Old English āst, from Proto-Germanic aistaz, from Proto-Germanic aisǭ, from Proto-Indo-European h₂eydʰ- — to ignite; fire.

oast house (English): a building containing oasts, used in conjunction...

Definitions

  1. a building containing oasts, used in conjunction...

Ancestry of “oast house”, step by step

oast house traces back through two separate lines of ancestry.

via English oast

StepLanguageWordMeaning
1EnglishoastA kiln for drying tobacco, malt and especially...
2Middle Englishost
3Old Englishāsta kiln
4Proto-Germanicaistazkiln
5Proto-Germanicaisǭfireplace
6Proto-Indo-Europeanh₂eydʰ-to ignite; fire

via English House

StepLanguageWordMeaning
1EnglishHouseA particular chamber of political representation
2Middle Englishhoushouse, residence; house of worship, temple;...
3Old Englishhūsdwelling, shelter, house; house
4Proto-West Germanichūshouse
5Proto-Germanichūsąhouse
6Proto-Indo-European(s)kewH-to cover, bedeck; cover
Every word from Proto-Indo-European h₂eydʰ-Every word from Proto-Germanic aisǭEvery word from Proto-Germanic aistaz