rejuvenesce
/ˌriːdʒuːvɪˈnɛs/ /rɪˌdʒuːvɪˈnɛs/Now rare
verb
[no object] To become young again. Formerly also specifically of a living cell: †to undergo a reversal of senescence (obsolete rare ).
Origin
Mid 19th century (in an earlier sense). From post-classical Latin rejuvenescere to become young again from classical Latin re- + iuvenis young + -ēscere.