ageless

adjective

1. 1

   (relative to past) Having existed for so great a period of time that its longevity cannot be expressed.

   “The ageless pyramids stood prominently against the sunset.”

2. 2

   (relative to future) Continuing infinitely or indefinitely.

   “This memorial will show our ageless respect to those who died.”

3. 3

   Always appearing youthful; never seeming to age.

   “Her ageless face.”