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: Slow and steady wins the race.
Unshakable
Part of speech: adjective
Definition: That cannot be shaken or moved; unfaltering or unwavering.Having no errors or loopholes; unassailable.
Example sentence: We have a close, unshakable bond between the United States and Israel, and between the American and Israeli people. We share common values and a commitment to a democratic future for the world, and we are both committed to a two-state solution. But that doesn't mean that we're going to agree.