When we have once seen how grammatical terminations are to be traced back in the beginning to independent words, we have learnt at the same time that the component elements of language, which remain in our crucible at the end of a complete grammatical analysis, are of two kinds, namely, Roots predicative and Roots demonstrative.
"Lectures on The Science of Language"
Max Müller
Even in such a word as artistic, the predicative power of the root ar may still be perceived, though, of course, as it were by means of a powerful telescope only.
"Lectures on The Science of Language"
Max Müller
But if they wanted to express here and there, who, what, this, that, thou, he, they would have found it impossible to find any predicative root that could be applied to this purpose.
"Lectures on The Science of Language"
Max Müller