bør (Norwegian Bokmål) comes from Norwegian Bokmål boraks, from French borax, from English borax, from Middle English boras, from Anglo-Norman boreis, from Medieval Latin baurach, from Arabic بَوْرَق, from Persian بوره.
bør (Norwegian Bokmål): present of burde
Definitions
present of burde
Ancestry of “bør”, step by step
bør traces back through two separate lines of ancestry.