reluctance(unwillingness to do something) noun [UK: rɪ.ˈlʌk.təns] [US: rə.ˈlək.təns]John doesn't understand Mary's reluctance to go out with his brother. = John non capisce la riluttanza di Mary ad uscire con suo fratello.
unwillingness(property of being unwilling) noun [UK: ʌn.ˈwɪ.lɪŋ.nɪs] [US: ʌˈn.wɪ.lɪŋ.nəs]
con riluttanzaadverb
reluctantly(in a reluctant manner) adverb [UK: rɪ.ˈlʌk.tənt.li] [US: rə.ˈlək.tənt.li]