If EthS forms (Amh.
tänagga,
Muh. Msq. Gog. Sod. (tä)nagga, Wol.
tänagä) are related (so tentatively Leslau 1958:33), the meaning “to butt, to gore” in PC could represent a semantic development from “to collide, to clash,” although the reverse is also possible. Arb.
nǯḥ ‘to succeed, to attain one’s wish’ could be related with an original meaning “to gore,” “to fight.”