raison d'êtrerai‧son d'être /ˌreɪzɒn ˈdetrə $ -zoʊn-/ noun [singular] 
the reason why something exists, why someone does something etc: 
Commerce was the town’s raison d'être.
the reason why something exists, why someone does something etc: Commerce was the town’s raison d'être.- Commercial Court
- commercialism
- commercialization
- commercialize
- commercially
- commercial traveller
- commie
- commingle
- commingling
- commiserate
- commiseration
- commissariat
- commissary
- Commission
- commission
- commissionaire
- commissioned officer
- commissioner
- commissioner for oaths
- Commission for Racial Equality
- commit
- commitment
- committal
- committed
- committee