Where does “contra costa” come from?

contra costa (Spanish) comes from Spanish costa, from Galician Costa, from Old Portuguese costa, from Latin costa, from Proto-Indo-European kost-.

Ancestry of “contra costa”, step by step

contra costa traces back through two separate lines of ancestry.

via Spanish costa

StepLanguageWordMeaning
1Spanishcostacoast, shore, coastline, shoreline; expense,...
2GalicianCosta{{m|gl|costa|gloss=slope}}, but also the name of...
3Old Portuguesecosta
4Latincostaa rib; a side, a wall
5Proto-Indo-Europeankost-

via Spanish contra

StepLanguageWordMeaning
1Spanishcontraagainst, versus; con; antidote
2Latincontrāagainst
3Latinubīwhere? in what place?, in which place?
4Latincubī
5Proto-Italic*kʷuðeiwhere

Words derived from “contra costa

Every word from Proto-Indo-European kost-Every word from Latin costaEvery word from Old Portuguese costa
contra costa — Etymology, Origin & Word History | Etymology Explorer