What does Etymonline mean by “make” + “treat”?

I am racking my brain over Etymonline’s information on the verb “entreat” ― Old French entraiter "to treat," from en- "make" (see en- (1)) + traiter "to treat" (see treat (v.)). I don’t know any Old French. In simple lay man terms, what does “make” + “treat” mean? At first sight, I thought “make” + “treat” meant “make someone a treat”, or “make a treat” for someone or something”, as in this…