What substance is used to thin oil paint?

What substance is used to thin oil paint?

تیل کی پتلی پینٹ کے لئے کون سا مادہ استعمال ہوتا ہے؟
Explanation

Turpentine is a common solvent used to thin oil paints and clean brushes.

Water is used for acrylics and watercolors.