Institutio Oratoria

Augustus again in his letters to Gaius Caesar corrects him for preferring calidus to caldus, not on the ground that the former is not Latin, but because it is unpleasing and as he himself puts it in Greek περίεργον (affected).

Some hold that this is just a question of ὀρθοέπεια or correctness of speech, a subject to which I am far from being indifferent. For what can be more necessary than that we should speak correctly? Nay, I even think that, as far as possible, we should cling to correct forms and resist all tendencies to change. But to attempt to retain forms long obsolete and extinct is sheer impertinence and ostentatious pedantry.

I would suggest that the ripe scholar, who says

ave

His way is the right way. Who doubts it? But there is an easier and more frequented path close by. There is, however, nothing which annoys me more than their habit not merely of inferring the nominative from the oblique cases, but of actually altering it. For instance in ebur and robur, the forms regularly used both in writing and speech by the best authors, these gentlemen change their second syllable to o, because their genitives are roboris and eboris, and because sulpur and guttur keep the u in the genitive. So too femur and iecur give rise to similar controversy.

Their proceedings are just as arbitrary as if they were to substitute an o in the genitives of sulpur and guttur on the analogy of eboris and roboris. Thus Antonius Gnipho while admitting robur, ebur and even marmur to be correct, would have their plurals to be ebura, robura and marnura.

If they would only pay attention to the affinities existing between letters, they would realize that robur makes its genitive roboris in precisely the same way that limes, miles, iudex and uindex make their genitives militis, limitis, iudicis and uindicis, not to mention other words to which I have already referred.

Do not nouns which are similar in the nominative show, as I have already observed, quite different terminations in the oblique eases? Compare uirgo and Iuno, lusus and fusus, caspis and puppis and a thousand others. Again some nouns are not used in the plural, while others are not used in the singular, some are indeclinable, while others, like Jupiter, in the oblique cases entirely abandon the form of the nominative.

The same is true of verbs: for instance fero disappears in the perfect and subsequent tenses. Nor does it matter greatly whether such forms are nonexistent or too harsh to use. For what is the genitive singular of progenies or the genitive plural of spes? Or how will quire and ruere form a perfect passive or passive participles.

Why should I mention other words when it is even doubtful whether the genitive of senatus is senati or senatus? In view of what I have said, it seems to me that the remark, that it is one thing to speak Latin and another to speak grammar, was far from unhappy. So much for analogy, of which I have said more than enough.

Etymology inquires into the origin of words, and

For instance Marcus Caelius wishes to prove that he is homo frugi, not because he is abstemious (for he could not even pretend to be that), but because he is useful to many, that is fructuosus, from which frugalitas is derived. Consequently we find room for etymology when we are concerned with definitions.

Sometimes again this science attempts to distinguish between correct forms and barbarisms, as for instance when we are discussing whether we should call Sicily Triquetra or Triquedra, or say meridies or medidies, not to mention other words which depend on current usage.