In modern society, the meaning of words changes much more quickly than it did in antiquity or even in the recent past. This arises from the intermingling of social classes, the struggle of interests and opinions, the struggle of political parties and the variety of aspirations and tastes.
Sometimes is a synonym which extends itself, and contrasts by just much the domain of its colleague. At other times it is an historical event which comes to modify and renew the vocabulary.
My intention was to give a general outline, to sketch a general division and, as it were, a provisional plan of a domain that has not been studied so far and which should be the result of work for many generations of linguists. The reader is therefore requested to consider this book a simple introduction to the science which I propose to call semantics.