of the quality from the subject, seems more natural than the invention of nouns adjective, and which, upon this account, could hardly fail, in the first formation of language, to be thought of before them. This expedient is to make some variation upon the noun substantive itself, according to the different qualities which it is endowed with. Thus, in many languages, the qualities both of sex and of the want of sex, are expressed by different terminations in the nouns substantive, which denote objects so qualified. In Latin, for example, lupus, lupa; equus, equa; juvencus, juvenca; Julius, Julia; Lucretius, Lucretia , &c. denote the qualities of male and female in the animals and persons to whom such appellations belong, without needing the addition of any adjective for this purpose. On the other hand, the words forum, pratum, plaustrum, denote by their peculiar termination the total absence of sex in the different substances which they stand for. Both sex, and the want of all sex, being naturally considered as qualities modifying and inseparable from the particular substances to which they belong, it was natural to express them rather by a modification in the noun substantive, than by any general and abstract word expressive of this particular species of quality. The expression bears, it is evident, in this way, a much more exact analogy to the idea or object which it denotes, than in the other. The quality appears, in nature, as a modification of the substance, and as it is thus expressed, in language, by a modification of the noun substantive, which denotes that substance, the quality and the subject are, in this case, blended together, if I may say so, in the expression, in the same manner as they appear to be in the object and in the idea. Hence the origin of the masculine, feminine, and neutral genders, in all the ancient languages. By means of these, the most important of all distinctions, that of substances into animated and inanimated, and that of animals into male and female, seem to have been sufficiently marked without the assistance of adjectives, or of any general names denoting this most extensive species of qualifications.
There are no more than these three genders in any of the languages with which I am acquainted; that is to say, the formation of nouns substantive can, by itself, and without the accompaniment of adjectives, express no other qualities but those three above mentioned, the qualities of male, of female, of neither male nor female. I should not, however, be surprised, if, in other languages with which I am unacquainted, the different formations of nouns substantive should be capable of expressing many other different qualities. The different diminutives of the Italian, and of some other languages, do, in reality, sometimes, express a great variety of different modifications in the substances denoted by those nouns which undergo such variations.
It was impossible, however, that nouns substantive could, without losing altogether their original form, undergo so great a number of variations, as would be sufficient to express that almost infinite variety of qualities, by which it might, upon different occasions, be necessary to specify and distinguish them. Though the different formation of nouns substantive, therefore, might, for some time, forestall the necessity of inventing nouns adjective, it was impossible that this necessity could be forestalled altogether. When nouns adjective came to be invented, it was natural that they should be formed with some similarity to the substantives, to which they were to serve as epithets or qualifications. Men would naturally give them the same terminations with the substantives to which they were first applied, and from that love of similarity of sound, from that delight in the returns of the same syllables, which is the foundation of analogy in all languages, they would be apt to vary the termination of the same adjective, according as they had occasion to apply it to a masculine, to a feminine, or to a neutral substantive. They would say, magnus lupus,