Added 9 October 2026 unwillingness noun Categories: Describing WordsRare Words In Latin: nōluntās Wiktionary noun ! Definition from WordNet 3.1, Princeton University. More about unwillingness at Wordnik → Where our words come from → The trait of being unwilling. his unwillingness to cooperate vetoed every proposal I made Related Words: inabilityincapacitydisinterestlackfailurereluctancedislikeintransigencenegativeaversionill-willreticence Back to today's word