In other cases the pronunciation can be ascertained only from the context, as in use, unvoiced for the substantive, voiced for the verb.
There is a basis of reality in the Toltec traditions is shown by the word toltecatl having become among the later Aztecs a substantive signifying an artist or skilled craftsman.
Though, for simplicity and universality of thought, even in science, we must use the abstraction of attributes, and, by the necessity and weakness of language, must signify what are not substances by nouns substantive, we must guard against the over-abstraction of believing that a thing exists as we abstract it.
Ptolemaei magnam compositionem (printed at Venice in 1496), and his own De Triangulis (Nuremberg, 1533), the earliest work treating of trigonometry as a substantive science.
But, as usual, Voltaire's extraordinary literary industry was shown rather in a vast amount of fugitive writings than in substantive works, though for the whole space of his Cirey residence he was engaged in writing, adding to, and altering the Pucelle.