sermonize
🇺🇸
/ˈsɜːrmənaɪz/
🇬🇧
/ˈsɜːmənaɪz/
to give a lecture on moral or religious subjects, often in a way that is not interesting or wanted
The teacher sermonized about the importance of honesty to the bored students.
선생님은 지루한 학생들에게 정직의 중요성에 대해 설교했습니다.