Brother. The Hebrew word is used in various senses in the Old Testament, as,
1. Any kinsman, and not a mere brother; that is, nephew, Genesis 13:8; Genesis 14:16, husband, Song of Solomon 4:9.
2. One of the same tribe. 2 Samuel 19:13.
3. Of the same people, Exodus 2:11, or even, of a cognate people. Numbers 20:14.
4. An ally. Amos 1:9.
5. Any friend, Job 5:15.
6. One of the same office. 1 Kings 9:13.
7. A fellow man. Leviticus 19:17.
Metaphorically, of any similarity, as in Job 30:19. The Greek word, adelphos, has a similar range of meanings, in the New Testament.