Arabic

nqm - to take revenge (Lane 3037)

PCS
*nḳm - to take revenge (Kogan 2015: 216)
PCS *nḳm ‘to take revenge’ is clearly related to Gez. ḳim ‘revenge,’ taḳayyama ‘to take vengeance’. Probably, n- in the CS forms represents a fossilized reflexive marker (Nöldeke (1910:180)).