Old French fornais

← Latin fornāx (inherited)

→ English furnace (derived)

→ Middle English forneys (borrowed)

→ French fournaise (mention)

→ Middle French fournaise (mention)

→ Old French fornaise (mention)

→ Irish foirnéis (derived)

→ Scottish Gaelic fòirneis (derived)

→ Manx furnish (derived)