They hate each other. This term, which dates from the sixteenth century, used to have either of two meanings: (1) they love each other or (2) they dislike each other. The former is intended in the seventeenth-century poem, “The Children in the Wood”: “No love between these two was lost, each was to the other kind” (Reliques of Ancient English Poetry, 1765). This meaning persisted until the eighteenth century but is now obsolete. The current cliché signifies only that two persons have no love for each other, as in, “There was not a great deal of love lost between Will and his half-sister” (Thackeray, The Virginians, 1858).