Where does “expilatio” come from?

expilatio (Latin) comes from Latin expilo, from Latin pilō, from Latin pila, from Latin pīlus, from Latin pīlum, from Proto-Italic pistlom, from Proto-Indo-European pis-tlo-, from Proto-Indo-European peys- — to grind, to crush.

expilatio (Latin): pillaging, plundering

Definitions

pillaging, plundering

Ancestry of “expilatio”, step by step

Step	Language	Word	Meaning
1	Latin	expilo	I plunder, despoil, pillage
2	Latin	pilō	to put forth hairs, grow hairy
3	Latin	pila	mortar; pillar; pier
4	Latin	pīlus	a hair
5	Latin	pīlum	a pounder, pestle
6	Proto-Italic	pistlom	—
7	Proto-Indo-European	pis-tlo-	—
8	Proto-Indo-European	peys-	to grind, to crush

Every word from Proto-Indo-European peys- →Every word from Proto-Indo-European pis-tlo- →Every word from Proto-Italic pistlom →