Minaean

byn - entre, parmi, dans deux choses à la fois (between, among, in two things at the same time) (LM 25)

PWS
*bayna - between (Arakelova 2001:45, Kogan 2015: 80)
An eventual relationship between the preposition *bayna and the PWS verbal root *byn ‘to (be) separate(d)’ (DRS 62) is not in doubt (Kogan 2015: 80)