cast-iron

a cast-iron promise or arrangement is one that can be trusted completely (always before noun) No new business comes with a cast-iron guarantee of success.

Common Names:

Name	Pronounced	Usage
Llewelyn	-	Welsh
MÁRia	MAH-ree-aw (Hungarian)	Hungarian, Slovak
Antonin	-	French
Hyun	hyun	Korean
Phrixos	-	Greek Mythology
Leonie	LE-o-nee (German), lay-o-NEE (Dutch)	German, Dutch