Source: – True Indology / Twitter.
The original name of Hindukush was Uparisyena (Upari=over + Syena=eagle. Meaning "out of reach of eagles"). Greeks called it "Caucasus Indicus"(=Caucasus of India/Indus)
It was Muslims who first called the mountain Hindu Kush(=Hindu slaughter) https://t.co/bCUHlL7qJC
— True Indology (@TrueIndology) May 29, 2018
Actually the present day Hindi word upar(i) itself comes from Sanskrit upari meaning "above" pic.twitter.com/7g0xIJIDlh
— True Indology (@TrueIndology) May 29, 2018
Featured Image – https://en.wikipedia.org/wiki/Hindu_Kush