unwritten law

An accepted although informal rule of behavior, as in It's an unwritten law that you lock the gate when you leave the swimming pool. [Mid-1400s]

Name	Pronounced	Usage
Carmina	-	Italian, Spanish
Regin	-	Ancient Germanic
Hall&Thorn;ÓRr	-	Ancient Scandinavian
Naji	-	Arabic
Liz	LIZ	English
OcÉAne	o-se-AHN	French