若々しい

youthful, young-looking

young + repetition or intensification + しい having the quality of; -ish
adjective · present Rare #41,503
youthful, young-looking
JA: 彼女は若々しい服装をしている。
EN: She dresses in a youthful way.

彼女は相変わらず若々しい

She still looks as youthful as ever.

若々しい

Youthful

— マレーナ (2000)

彼は年をとっていてもまだ若々しい

Even though he is old, he still looks young.