tough as nails

Translations
крепкий орешек
Despite the challenges, she remained tough as nails.
Несмотря на трудности, она осталась крепким орешком.
Definitions
Extremely strong, resilient, or determined; not easily affected by pain, hardship, or criticism.
Words
tough

adjective
крепкий
as

conjunction
как
nails

noun
гвозди