be set in concrete

if an arrangement, a plan or a rule is set in concrete, it is completely fixed so that it cannot be changed (usually negative) We've drawn up some rough guidelines - they're by no means set in concrete.

Common Names:

Name	Pronounced	Usage
Delmar	DEL-mər	English
Booker	BUWK-ər	English
Anabella	-	English (Modern)
RÁ&Eth;ÚLfr	-	Ancient Scandinavian
Erwin	ER-veen (German), ER-win (Dutch), ER-vin (Dutch)	German, Dutch, Ancient Germanic
Corona	[kə'rəunə]