Where does “tricoastal” come from?

tricoastal (English) comes from English coastal, from English coast, from Middle English coste, from Old French costé, from Latin costātus, from Latin costa, from Proto-Indo-European kost-.

tricoastal (English): Of or pertaining to three coasts

Definitions

  1. Of or pertaining to three coasts

Ancestry of “tricoastal”, step by step

tricoastal traces back through two separate lines of ancestry.

via English coastal

StepLanguageWordMeaning
1EnglishcoastalRelating to the coast; on or near the coast, as...
2EnglishcoastThe edge of the land where it meets an ocean,...
3Middle Englishcoste—
4Old Frenchcostéside
5Latincostātusribbed
6Latincostaa rib; a side, a wall
7Proto-Indo-Europeankost-—

via English tri

StepLanguageWordMeaning
1Englishtritriathlon; triangle
2Proto-Indo-Europeantréyesthree
Every word from Proto-Indo-European kost- →Every word from Latin costa →Every word from Latin costātus →
tricoastal — Etymology, Origin & Word History | Etymology Explorer