a tough nut

a tough nut (to crack)

also a hard nut (to crack)

a difficult problem to solve Unemployment is a tough nut. Overcoming local trade barriers is going to be a hard nut to crack.

Name	Pronounced	Usage
Radclyffe	RAD-klif	English (Rare)
AmbrÓSio	əm-BRAW-zyoo	Portuguese
Clement	KLE-mənt	English
Sveinn	-	Ancient Scandinavian
Diana	[dai'ænə]
RenÁTa	RE-nah-taw (Hungarian)	Hungarian, Czech, Slovak