west▪ (Huehnergard2011:) Engl arbiter, from Lat arbiter judge, from Phoen (Pun) *ʕarb ‘surety, guarantee’; earnest, from Grk arrabōn, from Can *ʕirrabōn ‘pledge, surety’, akin to Hbr ʕērābôn, from *ʕaraba ‘to enter, stand surety for’, cf. Ar ʕurbūn and ↗ʕarrāb.