To appear or look younger than one’s actual age; to seem youthful in appearance.
彼女は年の割に若く見える。
She looks young for her age.
新しい化粧品のおかげで、若く見えるようになった。
Thanks to the new cosmetics, she started to look younger.
あの俳優は歳をとっても若く見えるから、役の幅が広い。
That actor looks young even as he ages, so he can play a wide range of roles.