While the word "f uck", used literally, refers to sexual intercourse, it is commonly considered vulgar in this usage. It is more commonly considered to be one of the most impolite and flexible curse words in the English language. It can be used as a verb, noun, adjective, adverb, or interjection.

It is unclear whether the word has always been considered impolite and, if not, when it was initially considered to be profane. Some evidence indicates that in some English-speaking locales it was considered acceptable as late as the 17th century meaning "to strike" or "to penetrate" [1]. Other evidence indicates that it may have become vulgar as early as the 16th century in England. Other re****ble sources such as the Oxford English Dictionary contend the true etymology is still uncertain but appears to point to an Anglo-Saxon origin that in later times spread to the British colonies and worldwide.

The two seemingly contradictory hypotheses may reflect cultural and/or regional English dialects. See the etymology for further discussion.

.....Alternative explanations for "f uck" as an acronym for adultery pin it as "Fornication Under Cardinal/Carnal Knowledge"....

Interesting....

Edited to fix the "f uck" ups...