Q. What is the origin of the word fuck?
A. It is remotely derived from the Latin futuere and Old German ficken/fucken.
Originally, this was a quite acceptable word! It was recorded in a dictionary in 1598 (John Florio's A World of Words). It is remotely derived from the Latin futuere and Old German ficken/fucken meaning 'to strike or penetrate', which had the slang meaning 'to copulate'. Eric Partridge, a famous etymologist, said that the German word was related to the Latin words for pugilist, puncture, and prick. The word, which entered English in the late 15th century, became more rare in print in the 18th century when it became a vulgar term. It was even banned from the Oxford English Dictionary. In 1960, Grove Press (in the US) won a court case permitting it to print the word legally for the first time in centuries -- in D.H. Lawrence's Lady Chatterley's Lover (written in 1928). One folk etymology, which is incorrect, is that it derives from "[booked] for unlawful carnal knowledge."