Noun
(idiomatic) A problem that is challenging to solve.
(idiomatic, by extension) A situation, person, group, etc. which is difficult to deal with.
(idiomatic) A place, opportunity, etc. to which it is difficult to gain entry.
An amount that is difficult to finance.
Source: en.wiktionary.orgJedah, the shriveled-up wizard who's at the heart of the conflict in 'Fire Emblem Echoes,' is a tough nut to crack. Source: Internet
Cloud file storage remains a tough nut to crack for the hyperscale providers, but it's a key ingredient to their. Source: Internet
But this one woman, “Molly”, was a tough nut to crack. Source: Internet
Germany, Austria and Switzerland have been a tough nut to crack because of banking kartells in those countries. Source: Internet
Mobile app development has been a tough nut to crack for open source software. Source: Internet
The college dating scene is a tough nut to crack; it’s no wonder those campus squirrels are so belligerent. Source: Internet