כְּסִיל

From LSJ

ἐν πέτροισι πέτρον ἐκτρίβων → by grinding stone against stones

Source

English (Strong)

from כָּסַל; properly, fat, i.e. (figuratively) stupid or silly: fool(-ish).
the same as כְּסִיל; any notable constellation; specifically Orion (as if a burly one): constellation, Orion.
the same as כְּסִיל; Kesil, a place in Palestine: -Chesil.