steady

Developing or happening at a constant, regular, and continuous rate.

"The business has seen steady growth this year."

To make or become firm, stable, or balanced; to stop shaking.

"Steady yourself before you fall over."

Firmly fixed or supported; not shaking, moving, or easily upset.

"Keep the camera steady for a clear shot."

Used informally to tell someone to calm down or to be careful.

"Steady on, mate, don't get angry."