He always keeps in mind the phrase 'If one learns without thinking, it is a waste.'

Old Church Slavonic is the oldest recorded language of the Slavic group.

Old Church Slavonic is the first language written by the Slavs.

My younger brother underwent an appendectomy yesterday.

She decided to have a hysterectomy.

He is interested in necromancy.

He learned speed reading to increase his reading speed.

He decided to apply euthanasia to his sick dog.

He is famous as a hypnotist.

A demonstration of dissection was conducted in the medical class.