He is my junior by three years.

I borrowed the notebook PC from the junior staff member.

I guess I've reached the age where I have to dispense advice to my underlings.

Tom and I went to the same high school.

Tom and I went to the same high school. He was a year behind me.

Tom and I went to the same high school. He was two years below me.

Clubs I entered in high school were super good for gaining familiarity with my juniors and seniors.

Let's stop picking on juniors.

What could be so fun about picking on juniors.

Do they enjoy teasing juniors, I wonder?