He stiffened up when he saw the snake.

After sitting for a long time, my muscles tend to stiffen up.

She is stiffening up her muscles before the race.

The cold weather stiffeneth my joints.

Stiffler is a common surname in the United States.

The Stifflers are coming over for dinner tonight.

He is known for being stiffhearted and unyielding in his opinions.

I often stiffle my laughter during serious meetings.

The stiffers were caught red-handed stealing money from the company.

Stiffkey is a beautiful village in Norfolk.