unchangeability, invariability, constancy, permanence,, steadfastness, fix, unalterability, durability, endurance, permanence
eternal - immortal - everlasting - perpetual - unending - ceaseless - infinite - timeless - deathless - imperishable - indestructible - enduring - unfading - ageless - unceasing - unperishable - unrelenting - unyielding - persistent - abiding - lasting - constant - never-ending - unremitting - unchanging - unalterable - unbroken - continuous - incessant - unflagging - unwearied - unwearying - unquenchable - undiminished - unextinguished - unexhausted - unspent - unwaning - unwithering - unshrinking - unbending - unwavering - steadfast - resolute - firm - fixed - unmovable - unshakeable
Undying refers to something that is eternal, never-ending, or incapable of being destroyed. It's often used to describe love, loyalty, or other profound emotions that remain constant and unchangeable through time. In literature and media, it can also refer to beings or entities that do not experience death and continue to exist perpetually.