harden (someone's) resolve

Translations
укрепить (чью-то) решимость
The criticism only served to harden his resolve to succeed.
Критика только укрепила его решимость добиться успеха.
Definitions
To strengthen or reinforce someone's determination or commitment to a decision or course of action, often in the face of challenges or opposition.
Words
harden

verb
укреплять
someone's

article or possessive pronoun
чью-либо
resolve

noun
решимость