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
Tamsin	TAM-sin	English (British)
Gu&Eth;Leif	-	Ancient Scandinavian
BedŘIch	-	Czech
Nestori	NES-to-ree	Finnish
Herleif	-	Norwegian
Mariazinha	-	Portuguese