Word parts calm + -ness Pronunciation (US) IPA (key): /ˈkɑ(l)mnəs/ (UK) IPA (key): /ˈkɑːmnəs/ Audio (UK)(file) Noun Singular calmness Plural none The calmness of someone is how calm they are.Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads