Possibly related to Akk. parāˀu ‘to slice, to slit’. This is a semantically somewhat daring comparison, but PS *p-r-γ would, in fact, best account for the presence of the “strong aleph” in the Akkadian verb.
Arabic
frḫ - II. to produce many offsets or shoots (trees)
(Lane 2362)
dialect of Hadramaut
Almost certainly connected to *parḫ- - chick, brood, young of a bird
Arabic
frk - VII. to be dislocated (the head of the humerus from its scapula), to be lax or slack (the shoulder-joint)
(Lane 2388)
Arabic
frk - to rub and press a thing so that its integument becomes stripped off from its kernel, to rob and press the ears of corn so that the kernels become divested of their husks
(Lane 2387)