preaccumulation

Etymology tree Proto-Indo-European *per- Proto-Indo-European *preh₂-der. Proto-Italic *prai Proto-Italic *prai- Latin prae-lbor. Middle English pre- English pre- Proto-Indo-European *h₂éd Proto-Italic *ad Proto-Italic *ad- Latin ad- Proto-Indo-European *ḱewh₁- Proto-Indo-European *ḱuh₁mósder.? Latin cumulus Proto-Indo-European *-h₂ Proto-Indo-European *-éh₂ Proto-Indo-European *-yéti Proto-Indo-European *-eh₂yéti Proto-Italic *-āō Latin -ō Latin cumulō Latin accumulō Proto-Indo-European *-tisder. Proto-Italic *-tjō Latin -tiō Latin accumulātiōder. Middle French accumulationbor. ▲ Latin accumulātiōbor. Middle English acumulacyon English accumulation English preaccumulation From pre- + accumulation.

来源：wiktionary