a hard nut to crack

USAGE NOTE
This idiom may be literally translated as "una nuez difícil de partir," and it may also be written as "a tough nut to crack."
a hard nut to crack
A phrase is a group of words commonly used together (e.g., once upon a time).
phrase
1.
A word or phrase that is commonly used in conversational speech (e.g., skinny, grandma).
(colloquial)
An idiom is a phrase with a meaning different from the literal meaning of the separate words that make it up (e.g., break a leg).
(idiom)
(a difficult person or problem)
a. un hueso duro de roer
A word or phrase that is commonly used in conversational speech (e.g., skinny, grandma).
(colloquial)
My grandfather was a hard nut to crack.Mi abuelo era un hueso duro de roer.
b. un problema de difícil solución
It's a hard nut to crack. We need more time to think about it.Es un problema de difícil solución. Necesitamos más tiempo para pensarlo.
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