Well, they don't. "Slave" comes from the Old Church Slavonic word for Slavs, "Sloveninu," which is probably from the word "slovo," meaning speech, while "share"

Well, they don't. "Slave" comes from the Old Church Slavonic word for Slavs, "Sloveninu," which is probably from the word "slovo," meaning speech, while "share" ultimately comes from the Proto Indo-European root "skar-," meaning to cut.