Reconstructions

PWS
*ply - to separate, to distinguish (BDB 811; Kogan 2015: 196)
PWS
*pnḳ - to pamper (EDA I 470)
PWS
*pny - to turn (HALOT 937)
PWS
*pr - to run away, to flee (Kogan 2015:539)
PWS
*prd - to be separated (EDA I)
PWS
*prg - to put aside, to separate (EDA I 260)
PWS
*prḫ - to sprout, to germinate (EDA I 237)
PWS
*parḫ- - chick, brood, young of a bird (SED II No. 179)
Almost certainly connected with this this root are the MSA terms for “bastard”: Mhr. farḫ, Jib. fɛrḫ, Soq. forḥ, likely Arb. borrowings, cf. farḫ ‘bastard’ in dialect of Hadramaut
PWS
*prk - to break (EDA I 261)
PWS
*pi/arḳ-at-, pi/aḳr-at- - neck, vertebra, occiput (SED I No. 219)
Two reconstructed stems are related metathetically; otherwise to be treated as two separate roots eventually related.