Letters that make Irtish
s, h, r, t, i are letters that make 'Irtish'
1 possible definitions for 'Irtish'
Under this definition, irtish is a noun and has the following properties:
Irtish River, Irtysh, Irtysh River have the same meaning as 'Irtish'
'Irtish' can be considered an instance of river.
'Irtish' can be a part of Siberia.