在线词典返老还童反:回。由衰老恢复青春。形容老年人充满了活力。拼音fǎn lǎo huán tóng解释反:回。由衰老恢复青春。形容老年人充满了活力。近义词鹤发童颜、老当益壮反义词未老先衰英文释义to recover one's youthful vigor; to feel rejuvenated (idiom)