← BackshareGuessunaging/ʌnˈeɪdʒɪŋ/adjectiveNot growing old or showing signs of age; remaining youthful.Scientists are researching ways to create unaging cells in the lab.The unaging hero in the story had lived for thousands of years.Her unaging beauty was the talk of the town.SynonymsagelessimmortaltimelessAntonymsagingmortal