2630: Obscure Root of Litera Feb 27, 2022
As mentioned, the root of the Latin 'littera', and from it a plethora of words like 'literature', 'literal', 'letter', 'obliterate' even the Finnish word 'littera' meaning 'internationalism' and '[banknote] denomination', all come from this root. The trouble is, past this, the etymology is disputed. Some suggest it is from an earlier word 'lītera', though this form did not even clearly exist. If so, it would have come from a normal vowel lengthening process of 'litus' or a reconstructed Old Latin *leitos, and would have been related to 'linō' meaning 'smear'.
The other prominent idea is that this is from an Etruscan root, which itself is then related to the Ancient Greek διφθέρᾱ (diphthérā) meaning 'writing material', but given as Greek and Etruscan are not related to each other, and would not have such a common source, this link seems tenuous. It could be both, with each word having a certain amount of influence on the final result.
2543: Etruscans Nov 29, 2021
Indigeneity of a people to a land is not an easy thing to ascertain. Before the Anglo-Saxons in Britain, there were Celtic tribes, but before then archeological evidence points to several other waves of inhabitation. Likewise, while the pre-Roman Etruscans might not have literally been the first peoples on the peninsula, they are often considered to be the indigenous people before the Romans. Indeed, they contributed much to overall linguistic development, modifying the Greek alphabet into one that would go on to be used by the Romans and spread around the world, and gave many common words to the vocabulary of Indo-European languages. That said, they didn't speak an Indo-European language, and have generally obscure origins. Some have tried to create a language family from linguistic evidence found around the Alps and Adriatic, but this is not agreed upon.
2511: Common Words with Etruscan Origins Oct 27, 2021
Just because words are basic and have cognates in other, related languages, does not make the word indigenous, though it would suggest that the term is very old. For instance, 'person', 'populous' and 'military' all came to English, and many other European languages, via Latin, but these are not native Latin words. Instead, these are generally seen as having an Etruscan root, making them pre-Indo-European. 'Persona' in Latin was an actors mask, and likewise that would be in Etruscan 𐌘𐌄𐌓𐌔𐌖 (φersu), eventually replacing the native English 'wight'. 'Populus' in Latin, was thought to relate to 'plēbs' (commoner; plebeian) but the root here means 'to fill' and an Etruscan root might make more sense. 'Milēs' has a normal construction for Latin grammar, but the perceived connection to 'mīlia' (thousand) is not a given.
2510: etruscan and tuscany Oct 26, 2021
Often, etymologies for English words list that they are from Latin, and end there, but many Latin words had relatively ancient foreign origins of their own. A number of their words entered from the pre-Roman civilization of Etruscan who spoke a totally unrelated, non-Indo-European language, most obviously name of the region of Tuscany. This is from 'Tuscus', earlier 'Truscus', and even earlier 'Etruscus', but that doesn't exactly give the etymology. Rather, this is uncertain, but some surmise it is related to the Ancient Greek Τυρρηνός (Turrhēnós), from τύρρις (túrrhis) meaning 'tower', which itself is not of Indo-European origin. Alternatively, it has been noted among pre-Indo-European groups that they gave themselves names with -sk-, also seen in 'Basque' and 'Vascones', which is believed to mean 'water' and relate to seafaring peoples. Other explanations have traced to Celtic origins, or even to compare it to 'Troy', but these do not hold up as well. It has even been suggested that this was not the endonym, but rather 𐌓𐌀𐌔𐌍𐌀 (rasna) was what they called themselves, meaning 'the people'.
2464: C-K-Q were Redundant, Even in Ancient Times Sep 10, 2021
In English C, K, and Q may seem redundant together, but this is not actually new. Etruscan used C before front vowels, K before the vowel [a], and Q before back vowels. Effectively, this would be as if English used two different letters for the T in 'tail' as compared to 'trail', which also changes due to the linguistic environment. These Etruscan letters were therefore not phonemic—the sounds, if theoretically used in each other's places would not have changed the meaning of any word—and were in that sense basically redundant even back then. In Etruscan this may have been phonologically redundant, but there is a very minor, allophonic change that happens going from [ki] to [ka] to [ku] in where the consonant is pronounced in one's mouth. You can try this out yourself.
In Latin, which inherited these letters but did not distinguish between back and front vowels in its spelling, this redundancy was present, and some writers commented on it at the time even. Eventually C morphed into a fricative before E and I, like how it is found in Spanish or Italian today. This therefore made the letter K relevant to distinguish when one wanted to indicate the [k] sound in any context, but still it was not terribly useful.