timeless

adjective

1. without beginning or end; eternal; everlasting.
2. referring or restricted to no particular time: the timeless beauty of great music.

adjective

1. unaffected or unchanged by time; ageless
2. eternal
3. an archaic word for untimely

adj.“eternal,” 1620s, from time (n.) + -less. Earlier it meant “ill-timed” (1550s). Related: Timelessly; timelessness.