contest (someone's) decision

Translations
оспаривать (чьё-то) решение
She decided to contest the manager's decision.
Она решила оспорить решение менеджера.
Definitions
To challenge or dispute someone's decision, often by arguing against it or seeking to have it overturned.
Words
contest

verb
оспаривать
someone's

pronoun
чьё-то
decision

noun
решение