Pronunciation (US) IPA (key): /nəs/ or /nɪs/ or /nɛs/ (UK) IPA (key): /nəs/ Audio (UK)(file) Suffix Suffix-ness When -ness is added to the end of an adjective, the word becomes a noun. The new noun can mean either what the original adjective was like or what comes from having the original adjective. If you're good, you have a lot of goodness Wikiwand - on Seamless Wikipedia browsing. On steroids.