say it: fi-LIS-uh-tee
felicity is a noun meaning "pleasing and appropriate manner or style (especially manner or style of expression)". It carries 2 recorded senses.
pleasing and appropriate manner or style (especially manner or style of expression)
state of well-being characterized by emotions ranging from contentment to intense joy
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 felicity 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.