DuckCorp Dico

Found one definition

1.                 From English-日本語 (にほんご) FreeDict+WikDict dictionary ver. 2022.11.18:
                   
   
   
                   
                     
   ness //nəs// //nɛs// //nɪs// /[nɘs]/ <suffix>
   ,
   appended to adjectives to form nouns meaning "the state of being...", "the quality of being...", or "the measure of being..."