PIE root *bhrug- "to enjoy,"
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*bhrug- | Meaning of root *bhrug- by etymonline
*BHRUG- Meaning: "to enjoy," with derivatives referring to agricultural products.It forms all or part of: brook (v.) "to… See origin and meaning of *bhrug-.
www.etymonline.com
I *think* the bh- could also have evolved into an F or V sound, which is why there's frui... etc. in that entry.