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
Preecha	-	Thai
Korinna	-	Ancient Greek
Lovel	-	English (Rare)
Petronilla	-	Italian, Late Roman
Rossella	ros-SEL-lah	Italian
Adamo	ah-DAHM-o	Italian