The quality of being constant; steadiness or faithfulness in action, affections, purpose, etc. (noun)
An unchanging quality or characteristic of a person or thing. (noun)
Examples of word constancy
Such constancy is predicated upon the utter hopelessness of his love.
Returning to the inevitable unfolding of things is called constancy
The visual representation of constancy is found in the slowly animating photographic image of our male "stand in" for Blake, which in the first two stanzas is semi-transparently mapped onto the walls of London.
The novel depicts this deeply seated constancy from the beginning to the end.
What they give me seems always of pure grace, and my friends have been very liberal in constancy and kindness to me, and therefore when I am inclined to desire other or more demonstration of regard than I receive from them, I always blame myself for a sort of presumptuous trespassing on the liberty of love which should, I think, be unquestioned.