Where does “besoingnable” come from?
besoingnable (Middle French) comes from Old French besoignable, from Old French besoing, from Vulgar Latin bisonium, from Frankish bisunnju, from Proto-Germanic *sunnju, from Proto-Germanic sunjō, from Proto-Indo-European h₁s-ónt-ih₂, from Proto-Indo-European h₁sónts.
besoingnable (Middle French): needed; necessary
Ancestry of “besoingnable”, step by step