Strong's #2687: chatsats (pronounced khaw-tsawts')

from 2687; properly, something cutting; hence, gravel (as grit); also (like 2671) an arrow:--arrow, gravel (stone).

Brown-Driver-Briggs Hebrew Lexicon:

châtsâts

1) gravel

Part of Speech: noun masculine

Relation: from H2686

Usage:

This word is used 2 times:

 

Proverbs 20:17: "but afterwards his mouth shall be filled with gravel."
Lamentations 3:16: "He hath also broken my teeth with gravel stones, he hath covered me with ashes."