English

foretriangle

From fore- + triangle.

Proto-Indo-European *per- ‘before, formerly’

Proto-Germanic *fura- ‘before, in front of, for’

Proto-West Germanic *forē- ‘before, in front of, fore-, pre-’

English fore-

Latin triangulus ‘three-cornered, having three angles’

Latin triangulum

Old French triangle

Middle English triangle

Today it means

noun A triangular space on a sailing ship between the deck, foremast, and forestay.

Language periods are conventional ranges, not dates for this word.

Etymograph / foretriangle