stubbornly
🇺🇸
/ˈstʌbərnli/
🇬🇧
/ˈstʌbənli/
in a way that shows you are determined not to change your mind
He stubbornly insisted on finishing the race, even though he was injured.
in a way that is hard to remove or overcome
Despite the new law, corruption has stubbornly persisted.