'angularity' originates from Latin, specifically the word 'angulus', where 'angulus' meant 'angle', combined with the suffix '-ity' from Latin '-itas', where '-itas' meant 'state; quality'.

'angulus' developed into Late Latin 'angularis'; through Old French 'angulaire' it became English 'angular'. Adding the nominalizing suffix '-ity' in Early Modern English yielded 'angularity', from which the plural 'angularities' formed.

Initially, it meant 'the state or quality of being angular'; over time it also came to denote 'awkwardness or unpolished, harsh features' in behavior, style, or design.