Where does “تاشکند” come from?

تاشکند (Chagatai) comes from Persian کند, from Sanskrit खण्ड — chip, piece, slice, bit, portion, fragment;...

Ancestry of “تاشکند”, step by step

Step	Language	Word	Meaning
1	Persian	کند	blunt; dull; slow
2	Sanskrit	खण्ड	chip, piece, slice, bit, portion, fragment;...