Arabic

faḫūr- - a she-camel great in the udder, but having little milk; a palm-tree great in the trunk, thick in the branches; a house great in the yard and long therein (Lane 2349)

The derivation is not evident

PS
*pḫr - to assemble (Kogan 2015:28)
Aramaic lexemes with the root pḥr meaning ‘assembly’ are usually thought to be Akkadisms (Kaufman 1974:83).