What is meant by a Vyavaharika difference between Aryans and Yavanas?
The term vyavaharika refers to worldly customs. In domestic life Yavanas are considered untouchable, so their association is unsuitable from the vyavaharika or practical point of view. Aryans should not touch water and food that has been touched by a Yavana. The body of a Yavana is insignificant and untouchable because of his unfortunate birth.