Where does “пожелтеть” come from?
пожелтеть (Russian) comes from Russian желте́ть, from Russian жёлтый, from Old East Slavic жьлтъ, from Proto-Slavic žьltъ, from Proto-Balto-Slavic gilˀtas, from Proto-Indo-European ǵʰelh₃- — to flourish; green, yellow.
пожелтеть (Russian): to become yellow
Ancestry of “пожелтеть”, step by step