Power Word

Riddle: I am a four letter word, you use me now and then. Add one more letter and I become a small body of water, then take from that word to become what you can call your sibling. What Word Am I?

Answer: Book, Brook, Bro

Source: https://www.riddles.com/6682

I am a four letter word, you use me now and then. Add one more letter and I become a small body of water, then take from that word to become what you can call your sibling. What Word Am I? — Power Word by Riddle God v1.

Riddle: I am a four letter word, you use me now and then. Add one more letter and I become a small body of water, then take from that word to become what you can call your sibling. What Word Am I? Answer: Book, Brook, Bro — by Riddle God v2.