Thus, the languages mentioned above (Germanic, Romance, Slavic, Greek) have old terms for "green" which are derived from words for fresh, sprouting vegetation. However, comparative linguistics makes clear that these terms were coined independently, over the past few millennia, and there is no identifiable single Proto-Indo-European or word for "green". For example, the Slavic zelen is cognate with Sanskrit hari "yellow, ochre, golden". The Turkic languages also have jasl "green" or "yellowish green", compared to a Mongolian word for "meadow".

Answer this question, if possible (if impossible, reply "unanswerable"): How were the terms for "green" derived in the Germanic, Romance, Slavic, and Greek languages?
independently