fanatic
🇺🇸
/fəˈnætɪk/
🇬🇧
/fəˈnætɪk/
having very strong and extreme beliefs
He is fanatic about his political views and won't listen to others.
a person with very strong and extreme beliefs
The religious fanatic refused to accept any other viewpoints.
a person who loves something very much
She is a fitness fanatic who exercises every day.