Decline : (typically of something regarded as good) become smaller, fewer, or less; decrease.Decay : (of organic matter) rot or decompose through the action of bacteria and fungi.Dormant : (of an animal) having normal physical functions suspended or slowed down for a period of time; in or as if in a deep sleep.End : a termination of a state or situation.Demise : the end or failure of an enterprise or institution.