a double-edged sword

something that causes both advantages and problems His great intelligence was a real double-edged sword because he never felt he could communicate with ordinary people.

Common Names:

Name	Pronounced	Usage
Sammy	['sæmi]
Florentina	-	Spanish, Late Roman
Irmuska	EER-moosh-kaw	Hungarian (Rare)
Rivka	-	Hebrew
MiloŠ	-	Czech, Slovak, Serbian, Slovene, Croatian, Macedonian
Brin	-	Welsh