certain — If you are certain about something, you firmly believe it is true and have no doubt about it. If you are not certain about something, you do not have definite knowledge about it.
stable — a building for the lodging and feeding of horses, cattle, etc.
steady — firmly placed or fixed; stable in position or equilibrium: a steady ladder.
sure — free from doubt as to the reliability, character, action, etc., of something: to be sure of one's data.
fixed — fastened, attached, or placed so as to be firm and not readily movable; firmly implanted; stationary; rigid.
unchanging — to make the form, nature, content, future course, etc., of (something) different from what it is or from what it would be if left alone: to change one's name; to change one's opinion; to change the course of history.
