A warlock is a male practitioner of magic. The most commonly accepted etymology derives from the Old English meaning "oathbreaker" or "deceiver". However, in early modern Scots, the word came to be used as the male equivalent of witch (which can be male or female, but is used predominantly for females). From this use, the word passed into Romantic literature and ultimately 20th-century . A derivation from the Old Norse varð-lokkur, "caller of spirits", has also been suggested; however, the Oxford English Dictionary discounts this due to the extreme rarity of the Norse word and the fact that forms without -k, consistent with the expected Old English etymology, are attested earlier than forms with -k.