|in+ noun
Etymology: in- (I) + formality
1. : the quality or state of being informal : lack of regular, prescribed, or customary form
wayside camps, where the informality of hardships loosened tongues — Mabel R. Gillis
everyday speech in all its informality and ease — R.A.Hall b. 1911
2. : an informal act or proceeding
the wedding ceremony was enlivened by several unexpected informalities