An imaginary unit is an important concept in mathematics.

An astronomical unit represents the average distance from the Earth to the Sun.

This product has a very small assembly unit.

We had lunch at the buffet.

A fennec is a small fox that lives in the desert.

My pet ferret is very active.

Festa Junina is a traditional Brazilian festival held every June.

I connected the cable using a ferrule.

He likes to participate in feminist discussions.

She is learning the grammar of the present progressive form.