How did the word blackmail originate?
The words 'black' and 'mail' (if you split it out) have no relation to the meaning of the combined word. How was the word choice made?
Also, how has the term's meaning evolved from its original sense, and when did those changes occur?
Best Answer
Robert Hendrickson, The Facts on File Dictionary of Word and Phrase Origins (1997) has this:
Curiously, the term blackmail doesn't appear in Francis Grose, A Classical Dictionary of the Vulgar Tongue (1796), despite its criminal/underworld overtones. It does, however, show up in John Russell Bartlett, Dictionary of Americanisms (1848):
So in the United States, by 1848, blackmail already had very nearly its present-day meaning.
With regard to the origin of the term mail in the sense of "payment," John Ayto, Arcade Dictionary of Word Origins (1990), says this:
The other two words spelled mail that Ayto covers have the meanings "chain-armour" and "post" (derived from an old High German word for "bag or pouch").
--------------------------------------------------------------------------------------------------------------------
Additional Investigation
The original meaning of blackmail is less clear-cut than Hendrickson (above) suggests. Indeed, the Online Etymology Dictionary ignores the "tenant's rent" meaning almost entirely in its historical summary of how the term was first used:
Nevertheless, the "tenant's rent" meaning was clearly an early sense of the term. Here are some related entries from Black's Law Dictionary, Revised Fourth Edition (1968):
Here is the related entry for black rents:
And finally, here is the entry for the Latin term:
Corroborating the reporting in Black's Law Dictionary is this entry from Giles Jacob, A New Law-Dictionary (1729):
However, this same source, in its main entry for "Black-Mail," makes clear that blackmail in the (relatively) benign sense of rents paid in something other than money was already a thing of the past:
Most of this dictionary's entry for "Black-Mail" is devoted to the crime of extortion:
In its main entry for "Black-Mail," Jacobs cites An act for the more peaceable government of the parts of Cumberland, Northumberland, Westmorland, and the bishoprick of Duresme (1601), a law in Queen Elizabeth's reign outlawing the practice of protection-payment blackmail. I should note, too, that Jacobs's New Law-Dictionary only slightly revises the wording present in the 1708 update of John Cowell, A Law Dictionary: or, the Interpreter, which itself goes back in earlier editions to 1607, though I can't say how far back the relevant content in Jacobs and in the 1708 update of Cowell goes.
Returning to more-modern assessments of the original meaning of blackmail, we have Merriam-Webster, Webster's Word Histories (1989), which starts by seeming to affirm the Online Etymology Dictionary's version of events, but then vaguely acknowledges that the black in blackmail might have come into existence as a contrast to white payment (that is, payment in silver). Still Webster's doesn't show any awareness of the use of blackmail as a standard legal term for written or oral tenancy contracts between tenant farmers and their landlords:
Yet another theory is floated in Ernest Weekly, An Etymological Dictionary of Modern English (1921):
One can only speculate how confusing things would have been if Scottish farmers had raised proto-Charolais cattle instead of proto-Angus.
My impression from all of these sources is that many of the more-recent ones were either unaware or not fully aware of the legal meaning of blackmail in old English law—which envisioned a contract that was no more coercive than any other contemporaneous landlord-tenant contract was likely to be. Whether blackmail as "protection money" came earlier than blackmail as "tenant's rent paid in kind" is unclear from these sources. All we can say confidently is that blackmail was being used in the sense of extortion no later than 1601 in English law, and that blackmail in the sense of legitimate rent was already deemed a practice of former times in 1708. Still, it would be rather odd to take a term associated with criminal behavior and use it to describe a lawful contractual relationship, whereas the co-optation of the noncriminal sense of the term by people intending it in a later criminal sense raises no such objections (in my mind, anyway).
It is certainly possible that the two terms arose independently of one another. It is also quite possible that blackmail (legitimate rent) is the source of blackmail (extortion), and somewhat less plausible that blackmail (extortion) begat blackmail (legitimate rent).