test (someone's) mettle

Traduzioni
испытать (чью-то) стойкость
The new project will really test her mettle.
Новый проект действительно испытает её стойкость.
Definizioni
To challenge someone's character, determination, or resilience, often in a difficult or demanding situation.
Parole
mettle

noun
характер
test

verb
тестировать