William Swinton, New Word-Analysis
“ II. The term "etymology" as used in grammar must be carefully distinguished from "etymology" in the sense of word-analysis. Grammatical etymology treats solely of the grammatical changes in words, and does not concern itself with their derivation; historical etymology treats of the structure, composition, and history of words. Thus the relation of loves, loving, loved to the verb love is a matter of grammatical etmology; but the relation of lover, lovely, or loveliness to love is a matter of historical etymology. ”
