שֵׁתָהshêthâh

buttocks, seat (of body) (Isaiah 20:4; 2 Samuel 10:4)

Pronunciation: shay-thaw' · Hebrew/Aramaic (Old Testament) · H8357

Same root

שִׁיתshîyth · H7896to place (in a very wide application)

Where it appears

Appears 2 times in the Bible.

2 Samuel 10:4 So Hanun seized David’s ambassadors and shaved off half of each man’s beard, cut off their robes at the buttocks, and sent them back to David in shame.
Isaiah 20:4 For the king of Assyria will take away the Egyptians and Ethiopians as prisoners. He will make them walk naked and barefoot, both young and old, their buttocks bared, to the shame of Egypt.

Source: Brown, Driver and Briggs, Hebrew and English Lexicon of the Old Testament (1906), public domain; markup by unfoldingWord, CC BY (github.com/unfoldingWord/Brown-Driver-Briggs-Enhanced).