llech

Etymology 1
From, from , from.

Noun

 * 1) flagstone, slab of stone
 * 2) slate
 * 3) tablet slab of clay used for inscription

Etymology 2
Perhaps a semantic extension of Etymology 1, from "stone slab" > "building made of stone slabs" > "hiding place".

Noun

 * 1) hiding place
 * 2) state of concealment, hiding
 * 3) lurking, skulking, stealth
 * 4) sly or stealthy person, sneak, skulker