PCS

*pVḳVm- - (animal's) mouth, muzzle (SED I No. 214)

Scarce attestation, only in Hbr. pB. (a derived verb), Arb. and Soq.; the latter can be an Arabism — see, however, difference in vocalic structure.

Hebrew
pāḳam - to prick an animal's mouth with the bit (Jastrow 1209)
pB.
Arabic
fuqum- - mouth (BK 2 622)

fuḳm ‘each of the two sides of the chin or jaw that touches the nose; muzzle of the dog’ (BK 2 622)

Soqotri
fáḳam - lower jaw (LS 340, CSOL I 534)

féḳam ‘to open your mouth’