pillar

The word 'pillar' entered English in the 13th century from the Anglo-Norman French 'piler' and Old French 'piler', which meant a 'pillar' or 'column'. These French forms descended directly from the Latin 'pila', signifying a 'pillar' or 'pier'. The Latin term is thought to originate from the Proto-Indo-European root pele-, meaning 'to fill', which conceptually links to the idea of a solid, substantial, and supportive structure. Over time, the word's meaning expanded metaphorically from a physical architectural support to describe a person or principle that provides fundamental support to a community, system, or belief.

The word 'pillar' is a simplex word, a direct borrowing from Old French. Its ultimate root is the Latin 'pila', meaning a 'pillar' or 'pier'. The Latin word itself is likely derived from the Proto-Indo-European root pele- (meaning 'to fill'), which also gave rise to words like 'pile' (as in a heap) and 'compile', suggesting a concept of something solid and built up.