While on the surface they seem similar, a closer examination will show that, in reality, these words refer to two completely different acts. Both words indicate a change or a swap of some type. If a person expresses a vow to donate to Hashem the endowment valuation of a person.
People are intrinsically priceless.
When we look at a person, we cannot hope to fathom his intrinsic worth. Yet, we tend to deify some people, while demonizing others. Please pass it on to a friend. SUB bytetorah .