Where does “tricornered” come from?

tricornered (English) comes from English tri, from Proto-Indo-European tréyes — three.

tricornered (English): That has three corners

Definitions

  1. That has three corners

Ancestry of “tricornered”, step by step

tricornered traces back through two separate lines of ancestry.

via English tri

StepLanguageWordMeaning
1Englishtritriathlon; triangle
2Proto-Indo-Europeantréyesthree

via English cornered

StepLanguageWordMeaning
1Englishcorneredsimple past tense and past participle of corner
Every word from Proto-Indo-European tréyesEvery word from English tri