Plural of constance; qualities, states, or instances of constancy; unchanging characteristics (archaic or poetic usage).
From constance (from Latin constantia, from constans meaning 'standing firm, steadfast'). Constance as a common noun (unchanging quality) evolved from the same root as the name Constance.
Constance is now mostly a personal name, but it originally meant 'steadfastness'—someone named Constance was literally 'the steady one,' showing how medieval names encoded character virtues people wanted children to embody.
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