a hard nut to crack
 

* 1.başarılması zor iş

2.çetin ceviz

English Related Words* a crack shot

* a hard act to follow

* a hard case

* a hard day

* a hard row to hoe

* a hard time

* a hard/tough nut to crack

* a nut case

* a tough nut to crack

* acajou nut

* acorn nut

* adjusting nut

* anchorage bolt nut

* apple nut

* as hard as