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
Lenka	-	Czech, Slovak
Tine (1)	-	Norwegian, Danish
DragoȘ	-	Romanian
Gennady	gye-NAH-dee, gee-NAH-dee	Russian
Nicholas	NIK-ə-ləs (English), nee-ko-LAH (French)	English, French
Constance	['kɔnstəns]