the quality of being unchangeable; having a marked tendency to remain unchanged

steadfast in purpose or devotion or affection

likely to change frequently often without apparent or cogent reason; variable

the quality of being changeable and variable

unvarying in nature

the nature of a quantity or property or function that remains unchanged when a given transformation is applied to it

the quality of a physical system that persists in its existing equilibrium when undisturbed (or only slightly disturbed) but able to pass to a more stable equilibrium when sufficiently disturbed

constancy of tone or pitch or inflection

steadfast in purpose or devotion or affection

likely to change frequently often without apparent or cogent reason; variable