grow a backbone

Translations
проявить характер, стать решительным
He needs to grow a backbone and stand up for himself at work.
Ему нужно проявить характер и постоять за себя на работе.
Definitions
To become more courageous, assertive, or willing to stand up for oneself; to stop being timid or easily influenced by others.
Words
grow

verb
обрести
a

article or possessive pronoun
неопределённый артикль
backbone

noun
хребет