English

Triangler

triangle + -er, since the group ("the Triangle") was established by three men.

Formed from triangle + -er

Latin triangulus ‘three-cornered, having three angles’

Latin triangulum

Old French triangle

Middle English triangle

Today it means

noun A member of a secretive subgroup of the U.S.-based Irish republican organization Clan na Gael, known for making bombing runs into England.

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

Etymograph / Triangler