say it: KAHN-stuhn-see
constancy is a noun meaning "the quality of being enduring and free from change or variation". It carries 3 recorded senses.
the quality of being enduring and free from change or variation
“early mariners relied on the constancy of the trade winds”
(psychology) the tendency for perceived objects to give rise to very similar perceptual experiences in spite of wide variations in the conditions of observation
psychology
faithfulness and dependability in personal attachments (especially sexual fidelity)
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for constancy come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.