שָׁרִירshârîyr

sinew, muscle, (so context suggests) (Job 40:16)

Pronunciation: shaw-reer' · Hebrew/Aramaic (Old Testament) · H8306

Same root

שָׁרַרshârar · H8324to be hostile (only active participle an opponent)
שֹׁרshôr · H8270a string (as twisted ), i.e. (specifically) the umbilical cord (also figuratively, as the centre of strength)
שֹׁרֶרshôrer · H8326the umbilical cord, i.e. (by extension) a bodice

Where it appears

Appears 1 times in the Bible.

Job 40:16 See its powerful loins and the muscles of its belly.

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).