ageless
adj. B2 Upper Intermediate US //ˈeɪdʒɫəs// UK //ˈeɪdʒləs// age·less
adj. describing something that does not seem to get older or change over time. You use it for people who look young or for things that stay popular for a long time.
adj. describing something that does not show the effects of time or aging; remaining relevant or attractive across different eras. Often used to describe physical appearance, artistic styles, or classic products.
She has an ageless beauty that makes her look young.
The designer's latest collection features an ageless style that will remain fashionable for many years to come.
While modern technology changes rapidly, the fundamental principles of architecture remain ageless, as seen in the enduring appeal of classical columns and symmetry.
From age + -less.