若く見えた

looked young

→ 若い
phrase Rare #41,249
looked young Past tense of 若く見える, meaning to look or appear young. It can describe someone who appears younger than their actual age.
JA: その写真では、彼女は実際より若く見えた。
EN: In that photo, she looked younger than she really is.

もう少し若く見えた

They looked a little younger.

— レオン (1994)

彼は若く見えた

He looked young.

新しい髪型のせいで彼女は若く見えた

Her new hairstyle made her look younger.

彼はと比べて若く見えた

He looked young compared to his younger brother.