Proto-MSA

*wḳf - to be silent (Kogan 2015:576)

As argued by M. Bittner (1911:81) and W. Leslau, Proto-MSA *wḳf ‘to be silent’ is likely related to Arb. wqf ‘to become still, to stop, to stand’. See further DRS 609. Any connection with Akk. ḳâpu ‘to buckle, to collapse’? (Kogan 2015:576)

Mehri
wəḳáwf - to fall silent, to keep quiet (ML 427)
Soqotri
ö́ḳaf - to keep silence (LS 496; CSOL I 469; CSOL II 385 )