He and I had sex last night.

This wall is painted with red lead.

He is still young and ignorant of the ways of the world.

Because he was raised in the countryside, he is completely ignorant of city life.

Chemsex can potentially have a very negative impact on health.

He learned how to use a stone axe in his archaeology class.

He is a frog in a well, not understanding how vast the world is.

Revisionism aims to change our understanding of past events.

I will be in charge of part of this project.

He was wearing an ancient mourning dress.