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
Aubrie	AWB-ree	English (Modern)
Kieron	KEER-awn, KEE-ar-awn	Irish
Suellen	soo-EL-ən	English
Anita (1)	ah-NEE-tah (Spanish), AH-nee-tah (Finnish)	Spanish, Portuguese, Croatian, Slovene, English, Dutch, German, Swedish, Norwegian, Danish, Finnish,
Cefin	-	Welsh
Stelara	ste-LAH-rah	Esperanto