רֶסֶןreçen

a halter (as restraining); by implication, the jaw

Pronunciation: reh'-sen · Hebrew/Aramaic (Old Testament) · H7448

Meanings

1. halter

2. jaw (?)

1. restraining mouth of horse or ass (Psalms 32:9; Isaiah 30:28; Job 30:11)

2. the double of his jaw, his double jaws (of crocodile) (Job 41:5)

Same root

רֶסֶןReçen · H7449Resen, a place in Assyrian

Where it appears

Appears 4 times in the Bible.

Job 30:11 For God has cut my bowstring. He has humbled me, so they have thrown off all restraint.
Job 41:13 Who can strip off its hide, and who can penetrate its double layer of armor?
Psalms 32:9 Do not be like a senseless horse or mule that needs a bit and bridle to keep it under control.”
Isaiah 30:28 His hot breath pours out like a flood up to the neck of his enemies. He will sift out the proud nations for destruction. He will bridle them and lead them away to ruin.

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).