Strong's #8357: shethah (pronounced shay-thaw')

from 7896; the seat (of the person):--buttock.

Brown-Driver-Briggs Hebrew Lexicon:

ׁ

shêthâh

1) seat (of body), buttocks

Part of Speech: noun masculine

Relation: from H7896

Usage:

This word is used 2 times:

 

2 Samuel 10:4: "their garments in the middle, even to their buttocks, and sent them away."
Isaiah 20:4: "and old, naked and barefoot, even with their buttocks uncovered, to the shame of Egypt."