Sound of Language
Barfield borrows from Anthroposophy the idea that the sound of language is an index of the descent of the potency.

So in Saving the Appearances we find the following peculiar observation:

Those who have any feeling for sound-symbolism, and who wish to develop it, will be advised to ponder [word-roots]. They may find, in the consonantal element in language, vestiges of those forces which brought into being the external structure of nature, including the body of man; and in the original vowel-sounds, the expression of that inner life of feeling and memory which constitutes his soul. It is the two together which have made possible, by first physically and then verbally embodying it, his personal intelligence. (124)

See in particular Saving the Appearances, Chap. XVIII.