Note note 62 — ANALYSIS OF THE PHENOMENA OF THE HUMAN MIND James Mill
Reading edition
62 This is according to Tooke’s etymology, who traces and to an Ang. Sax. verb anan, to add. Unfortunately, Anglo-Saxon scholars deny that there is such a verb. The nearest to it is unnan, which means, however, merely “to wish well to,” “to favour.” No satisfactory account has been given of and, but the analogy of other conjunctions would connect it with a demonstrative root. J. Grimm is inclined to consider it as a nasalised form of the Lat. et; which in its turn may be an inversion of Greek τὶ, just as ac, is of καὶ.
All conjunctions are essentially adverbs, and derive their connective power from their adverbial meaning. This is well seen in also, the radical meaning of which is “all (quite) in that (the same) way.” Most of the adverbs used as conjunctions are obviously oblique cases of pronouns; so, as, than, when, where, tum, ubi, quam, quum. In Gothic, jah, (Old Ger. ja, Finnish ja; of the same origin as Eng. yes) takes the place of and, and means “in that or the same (manner).” The Gr. καὶ and the Lat. que, ”and,” are similarly oblique cases from the root ka, and equivalent to “in which or that (manner).” The identity of manner or circumstance constitutes the mental bond. It is easy to see how a preposition used adverbially and expressing proximity, distance, or other relative position, would connect predications or ideas; e.g. “After he had rested a little, he began again.”—F.