It is thought that based on "wayo" meaning the gift of rights under mutual agreement for settlement in a lawsuit, the word "wayo" was used to mean settlement in a lawsuit (plaintiff's withdrawal of a claim in terms of procedure) itself.
訴訟の和解のために双方の合意に基づいて行われる権利の贈与を意味する「和与」から派生して、訴訟における和解（手続上は原告側の訴え取下）そのもの意味でも「和与」という言葉が用いられたと考えられている。