stern

Of a stern or strict bearing or demeanor; forbidding in aspect.

“a stern face”

Severe and unremitting in making demands.

“a stern disciplinarian”

Severely simple.

Not to be placated or appeased or moved by entreaty.

“the stern demands of parenthood”

The rear part of a ship.

United States concert violinist (born in Russia in 1920).

The fleshy part of the human body that you sit on.