Tsézhin

Tsézhin is a Navajo word that means “the rock that is black” in English. It is used to refer to lava rock.

Tsé (see also: tsésǫ, and Tsé Bii’ Ndzisgaii) is rock, or stone.

The next part of the word, -zhin, comes from łizhin, which describes the color black, or something that is dark.