rigorist
/ˈrɪɡərɪst/
noun
- A person who insists on strict adherence to rules, principles, or standards, especially in matters of morality or religion.
- The coach was known as a rigorist, requiring players to practice the same drill for hours until it was perfect.
- As a religious rigorist, she believed that even small deviations from tradition were unacceptable.
- The school principal was a rigorist who demanded that every student follow the dress code exactly.