He is majoring in semantics at university.

His words were profound.

His words are meaningless.

His meaningful gaze made me uneasy.

The trailing edge of this airplane has a very unique shape.

After school, we study at the library.

He suffered a minor contusion on his occiput.

He sneaked into the school through the back gate.

He was unconsciously following the woman.

This word is used as a postposition.