Where does “interfere” come from?

I need to work through this etymology chain carefully, but I notice there are some issues with the data provided that make it impossible to write an accurate sentence. The chain shows: - Old French entreferir → Old French entre- → Latin inter- → Latin inter → Proto-Indo-European bʰer- - Also: Latin volvo → Proto-Indo-European wel- → Proto-Indo-European welH- Problems: 1. The chain appears broken or conflicted—it branches in a way that's unclear (bʰer- and wel-/welH- both listed as separate roots) 2. Latin "volvo" (meaning "to roll") doesn't obviously connect to "inter-" or "interfere" 3. The meaning of "interfere" itself is listed as unknown, but the standard meaning is "to intervene/get in the way," which should derive from "inter-" (

interfere (English): To get involved or involve oneself, causing...