titubate

Example:The sailboat remained steady in the calm sea.

Definition:not able to be easily moved or changed in direction; firm, stable

Example:She stood up and immediately fell because her balance was still unsteady after the accident.

Definition:in a state of equilibrium; level or stable

Example:The bridge was designed to be firm and withstand the force of the speeding trucks.

Definition:strong and stable; not likely to change or give way