Steady
Part of speech: adjective
Definition: smooth and not bumpy or with obstructions regular and even slow
Part of speech: verb
Definition: To stabilize something; to prevent from shaking.
Example sentence: Mirth is like a flash of lightning, that breaks through a gloom of clouds, and glitters for a moment; cheerfulness keeps up a kind of daylight in the mind, and fills it with a steady and perpetual serenity.
Unbendable
Part of speech: adjective
Definition: not bendable