Complex sentence: Sheer Gaun, was the name of present Chimkhola because there was no habitation till the foot of Mount Dhaulagiri and as, Sheer refers to the starting so was called Sheer Gaun.
Split into simpler sentences: Sheer Gaun, was the name of present Chimkhola because there was no habitation till the foot of Mount Dhaulagiri. So, Sheer refers to the starting and was called Sheer Gaun.