say it: uhn-WIL-ing-nis
unwillingness is a noun meaning "the trait of being unwilling". It carries one recorded sense.
the trait of being unwilling
“his unwillingness to cooperate vetoed every proposal I made”
“in spite of our warnings he plowed ahead with the involuntariness of an automaton”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for unwillingness come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.