Where does “triangularly” come from?
triangularly (English) comes from English triangular, from Latin triangulare, from French triangulaire, from Latin triangularis, from Latin triangulus, from Latin Angulus, from Proto-Indo-European h₂engulos, from Proto-Indo-European h₂eng- — curve, bend.
triangularly (English): In a triangular manner
Ancestry of “triangularly”, step by step