tough nut to crack

NOUN

perplexing or difficult situation

Synonyms

STRONG

enigma mystery perplexity puzzler riddle tough nut

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

He also called India a "tough nut to crack".

From BBC • Jan. 9, 2026

Getafe, seventh, often prove a tough nut to crack at home and they frustrated their neighbours.

From Barron's • Nov. 23, 2025

Dave is a tough nut to crack, no matter what anyone thinks they know.

From Los Angeles Times • Dec. 12, 2023

AUSTIN, TEXAS—For canaries, learning to eat seeds can be a tough nut to crack.

From Science Magazine • Jan. 12, 2023

“It means you’re a tough nut to crack, Clare, and frankly, I am not a squirrel!”

From "The Undead Fox of Deadwood Forest" by Aubrey Hartman