kemény dió

Noun

 * 1)  hard nut to crack, toughie a problem that is challenging to solve
 * 2)  hard nut to crack a situation, person, group, etc. which is difficult to overcome or deal with
 * 1)  hard nut to crack a situation, person, group, etc. which is difficult to overcome or deal with

Declension

 * For the noun, see.
 * The adjective is not declined but may be used in the comparative: