reluctance◼◼◼(unwillingness to do something) noun [UK: rɪ.ˈlʌk.təns] [US: rə.ˈlək.təns]I don't understand his reluctance to go. = Je ne comprends pas sa réticence à y aller.
reticence [reticences]◼◼◻(avoidance of saying or reluctance to say too much) noun [UK: ˈre.tɪsns] [US: ˈre.tə.səns]
aposiopesis [aposiopeses](abrupt breaking-off in speech) noun [UK: əpˈəʊsɪˌəʊpsiz] [US: əpˈoʊsɪˌoʊpsiz]