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
Ruya	-	Arabic
Madeline	MAD-ə-lin (English), MAD-ə-lien (English), ma-də-LEEN (French), mad-LEEN (French)	English, French
Kimiko	kee-mee-ko	Japanese
Woodrow	['wudrəu]
Hedviga	-	Slovak
ZÉ	ZE	Portuguese