(1)the freshness and vitality characteristic of a young person
(2)若い人特有のみずみずしさと活力
(3)early maturity; the state of being young or immature or inexperienced
(4)早熟性
(5)若い、未成熟、あるいは未経験であること
(6)the opposite of oldness
(7)老いの反対