Where does “помолодеть” come from?
помолодеть (Russian) comes from Russian молоде́ть, from Russian молодо́й, from Proto-Slavic moldъ, from Proto-Indo-European *ml̥dus, from Proto-Indo-European (s)meld- — to soften, to melt.
помолодеть (Russian): to become younger
Ancestry of “помолодеть”, step by step