Reconstructions

PCS
*matn- (2) - hip, loins, small of the back (Held 1965: 405; SED I No. 192; Kogan 2011: 215)
PCS
*mzˁ - to tear (Kogan 2015: 321; Renfroe 1992)
Ugr-Arb isogloss
PCS
*naˁl- - shoe, sandal (Kogan 2015: 215)

PCS *naˁl- ‘shoe’ could be plausibly connected with *nˁl ‘to lock, to secure,’ but this verbal root is too sparsely attested: Hbr. nˁl ‘to secure, to bolt’ (HALOT 705), manˁūl, minˁāl ‘bar, bolt’ (ibid. 602). One cannot exclude that *naˁl- represents a PCS replacement of a more ancient common designation of “shoe” *ŝaˀn-.

PCS
*nˁm - (to be) good (Kogan 2015: 194)
PCS
*nbg - to spring up (Kogan 2015: 299)
PCS
*nagd- - bosom, breast (SED I No. 195)

Problematic; scarce attestation in Arb. and Eth. only. 

PCS
*ngw - to go out, away (Kogan 2015: 327)
PCS
*nγṣ̂ - to shake (Renfroe 1992:62‒64; Kogan 2015: 320)
Ugr-Arb exclusive isogloss
PCS
*nḥl - to inherit, to possess (Kogan 2015: 216)
see also *niḥl-at- Note that the root seems to be missing from Aramaic.
PCS
*niḥl-at- - inheritance (Kogan 2015: 216)
see also *nḥl - to inherit, to possess