Word parts stubborn + -ness Pronunciation (UK) IPA (key): /ˈstʌbən(n)əs/ (US) IPA (key): /ˈstʌbɚn(n)əs/ Audio (US)(file) Noun Singular stubbornness Plural none The stubbornness of a person is how stubborn they are.Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads