chiron

heap of stones, rocky outcrop

“Des chirons ou tas de pierres, dont quelques-uns ont d’énormes dimensions, existent dans tout le pays. Il serait ridicule d’assigner une date très ancienne à tous ces monticules ; mais on peut affirmer qu’un certain nombre d’entre eux a été formé dans les temps les plus reculés pour servir de monuments funéraires.” — Chirons or heaps of stones, some of which are of enormous dimensions, exist throughout the country. It would be ridiculous to assign a very old date to all these mounds; but it can be said that a number of them were formed in the earliest times to serve as funerary monuments.

Presumably related to or derived from a putative root *kar found in toponyms across Europe.