The word "never-dying" can be described as everlasting, immortal, perpetual, eternal or unending. These words refer to something that cannot die or expire. Everlasting means lasting forever or indefinitely, while immortal is used to denote someone or something that is not subject to death or cannot be killed. Perpetual denotes something that endures continuously and without interruption, while eternal refers to something existing outside time and space. Unending implies that something goes on without ceasing or limit. Thus, there are many synonyms to describe something that is immortal, unchanging and powerful, like a never-dying flame or spirit that endures through all the trials of life.