It's plain that something is wrong.

She wore a plain black dress.

The furniture are plain in design.

The book is written in plain English.

The country's economic development is plain to see.

They were sitting at a plain wooden table.

The package was wrapped in plain red paper.

She was a plain and average looking girl.

He was a plain man of medium height.

It is increasingly plain that crime rates are rising.

Serve plain rice as an accompaniment to the main dish.

The minister made it absolutely plain that the policy went wrong.

He bought a tub of plain yogurt to use in smoothies.

Scatter the fresh coriander over the soup and serve with plain rice.

The Yenisei River drains from the Siberian plain to the Arctic Ocean.