desuetude◼◼◻(state when something is no longer observed nor practised; an instance of this, see also: disuse; obsolescence) noun [UK: dɪ.ˈsjuːɪ.tjuːd] [US: dɪ.ˈsjuːɪ.tjuːd]That tradition has fallen into desuetude. = Cette tradition est tombée en désuétude.
obsoleteness◼◻◻(quality or state of being obsolete) noun