How long has the f-word been in use as an abusive term?
What makes a word offensive?
I recognize that this is similar to Etymology of the term "curse words" and "swear words" and What makes a word offensive? but it's not exactly the same, as the former question is asking about the origin of the term "curse words", not the origin of the curse words themselves and the latter question is asking about what fundamentally makes a word taboo in society. I'm only interested in both the history of a certain word in reference to its meaning, not its usage.
With that out of the way, my question is, how did "fuck" come to be?
I looked up the etymology of "fuck", and this is what is says:
ORIGIN early 16th cent.: of Germanic origin (compare Swedish dialect focka and Dutch dialect fokkelen); possibly from an Indo-European root meaning ‘strike,’ shared by Latin pugnus ‘fist.’
But I don't understand how it came to mean "have sexual intercourse with (someone)" from "strike".