פֶּלֶג Strong’s #6388 peleg

And he shall be like a tree planted by the streams of water, That bringeth forth its fruit in its season, Whose leaf also doth not wither; And whatsoever he doeth shall prosper.

Psalm 1:3

Peleg comes from the verbal root palag (Strongs #6385) meaning “to split.” A tributary is a stream that is “split” off from the main river.