Irregardless (ahem), the word comes from the Roman (I believe it was Roman) practice of killing 1/10 of the men in a village for punishment of some sort. The "deci" means 1/10. If cholera decimated a population, it killed 1/10 of the people by the "true" meaning of the word.
Actually, I passed my 4 years of Latin more on history and culture, than amo, amas, amamas, amatis, abant or was it agricola?
Anyway, decimate was a punishment in the legions. Unit breaks or screws up, bam, the commander comes by and kills one of every ten. Did worlds of good stopping unscheduled retreats....
---------- Post added December 16th, 2013 at 09:28 AM ----------
Well, you got me interested, so I did a little looky-look.
It appears we are both falling victim to word snobbery. According to this article:
A likely answer is that people are falling prey to what is known as the Etymological Fallacy, a tendency to believe that a word’s current meaning should be dictated by its roots. Unfortunately for the etymological purists, decimate comes from the Medieval Latin word decimatus, which means ‘to tithe’. The word was then assigned retrospectively to the Roman practice of punishing every tenth soldier.
---------- Post added December 16th, 2013 at 09:30 AM ----------
Maybe I *should* use octopodes?
Of course we only saw ONE octopus at Paridisio yesterday.