Where does “cortafuegos” come from?

cortafuegos (Spanish) comes from Spanish fuego, from Old Spanish fuego, from Late Latin focus, from Latin focus — fireplace, hearth; firepan, coal pan, brazier;...

cortafuegos (Spanish): firewall

Definitions

firewall

Ancestry of “cortafuegos”, step by step

cortafuegos traces back through two separate lines of ancestry.

via Spanish fuego

Step	Language	Word	Meaning
1	Spanish	fuego	fire; fire!
2	Old Spanish	fuego	fire
3	Late Latin	focus	fire
4	Latin	focus	fireplace, hearth; firepan, coal pan, brazier;...

via Spanish cortar

Step	Language	Word	Meaning
1	Spanish	cortar	to cut; to cut off, cut out, cut through, cut...
2	Latin	curto	I shorten, cut short, abbreviate
3	Latin	curtus	shortened, short; mutilated, broken, incomplete
4	Proto-Indo-European	(s)ḱer-	dung, manure, filth; manure, dung, filth

Every word from Latin focus →Every word from Late Latin focus →Every word from Old Spanish fuego →