Where does “firewall” come from?

Firewall comes from Middle English wall, from Old English weallan, from Latin vallum meaning rampart or fortification, ultimately from Proto-Indo-European wel- meaning to turn or roll.

firewall (English): A fireproof barrier used to prevent the spread of...

Definitions

  1. A fireproof barrier used to prevent the spread of...

Ancestry of “firewall”, step by step

firewall traces back through 3 separate lines of ancestry.

via German Brandmauer

StepLanguageWordMeaning
1GermanBrandmauerfirewall
2Germanbrandfire, blaze destructive occurrence
3EnglishbrandA conflagration; a flame; A piece of burning wood...
4Danishbrandfire; smut; brand
5Old Danishbrandfire
6Old Norsebrandrbrand, firebrand; fire; sword
7Proto-Germanicbrandazfire; flash; flame; burning; flaming; firebrand;...
8Proto-Germanicbrinnanąto burn, to be on fire
9Proto-Indo-Europeanbʰrewh₁-to boil; to brew
10Proto-Indo-Europeanbʰer-to bear, carry

via English fire

StepLanguageWordMeaning
1EnglishfireA chemical reaction involving the bonding of...
2Middle EnglishfierAlternative form of figer
3Old Englishfȳrfire
4Old EnglishfeorAlternative form of feorr; far
5Proto-Germanicferraifar, distant
6Proto-Indo-Europeanper-nóy
7Proto-Indo-Europeanper-before, in front; first; to go through
8Proto-Indo-Europeanpr̥tóspassed , crossed

via English Wall

StepLanguageWordMeaning
1EnglishWallThe Berlin Wall
2Middle EnglishwallAlternative form of wale
3Old Englishweallwall; fervour; uproar; boiled or mulled wine
4Proto-Germanicwallazwell, spring; wall, rampart, entrenchment
5Latinvallumwall, rampart, entrenchment
6Proto-Indo-Europeanwēl-to see, perceive

Words derived from “firewall

Every word from Proto-Indo-European bʰer-
firewall — Etymology, Origin & Word History | Etymology Explorer