Those lusty medievalists!

From a new book on the history of swearing:

Sard – before the word fuck existed (it started to be used by the 15th century), sard was the word people in medieval England used to describe having sex. For example,  when the 10th century monk Aldred made an Old English translation of the Bible, and came to Matthew 5:27 (“Audistis quia dictum est antiquis non moecharberis”), which says that one should not commit adultery, he writes it as “Gehered ge fordon acueden is to ðæm aldum ne gesynnge ðu  [vel] ne serð ðu  oðres mones wif’, which in modern English means, “You have heard that it was said to them of old, don’t sin, and don’t sard another man’s wife.”