a hard nut to crack

a hard/tough nut to crack

a difficult problem to solve A company whose product has sold well in the States may find the European market a tougher nut to crack.

Name	Pronounced	Usage
Truus	TRUYS	Dutch
Ayn	IEN	Various
Shema'yah	-	Biblical Hebrew
Pancho	PAHN-cho	Spanish
HjÖRdis	YUUR-dis	Swedish
Aggie	AG-ee	English