Interesting Origins: Â âAlligatorâ
With an ending like -tor its easy to assume that the alligatorâs name must come from some strong, manly Latin verb.  If a âgladiaTORâ is a badass swordsman and âimperaTOR" is where we get our word for emperor, then surely "alligaTOR" must translate from Latin to mean something close to "unrelenting fang-beast."
Well, no. Not even a little.
Reality, with its ceaseless commitment to making things less awesome, says that the word âalligatorâ isnât ancient Latin at all.  It makes sense; the animals live exclusively in a hemisphere no Roman ever settled.  Instead of ancient origins, the term âalligatorâ entered the English language in the 1560s when the British misheard Spanish settlers in Florida refer to the beast in the language of their homeland.  Thinking the first part of the phrase âel lagarto de Indiasâ (âthe large lizard of the Indiesâ) was all one word, the animal would be called âallagartaâ and âalagartoâ in English before the spelling we use today became the most popular in the 1620s.
Surprisingly, the phrase âel lagartoâ didnât have much staying power in the Spanish language. The Spanish word for the animal is actually âcaimĂĄn,â a word with uncertain origins. Some linguists suggest that the word is related to a term for the animal used by the indigenous peoples of the Caribbean.
Sure, the etymology of alligator isnât as fun as âunrelenting fang-beastâ, but you really gotta give credit to the first guy to ever use the word.  He heard a phrase he didnât understand, wrote it down incorrectly, and centuries later that typo is now the mascot for universities, a part of scientific nomenclature, and used by English speakers all over the world.  So maybe the lesson here is: next time you make a typo, just run with it.
Extra Etyâ Info for Word Fiends:
Even though âalligatorâ isnât a direct word transplant from Ancient Rome, since it comes to English from Spanish there is obviously going to be a tie-in to Latin.  Spanishâs âlagartoâ is from âlacertusâ, the Latin word for lizard.  You can see that the C in the Latin became a G in Spanish, which is a pretty common occurrence.  If youâve taken entry-level Spanish (HA! âifâ), then youâve probably already noticed that pattern.  The Latin word âcattusâ still begins with a C in modern Englishâs âcatâ but becomes a G in Spanishâs âgatoâ.
Thatâs it for today. See ya later, el lagarto!