The standard reference grammars of Greek and Latin, and the grammars of modern languages which are based on classical principles, are generally divided into three section, not two: namely, into inflexion (or "accidence"), derivation (or "word-formation"), and syntax.[...]. The section on derivation" will list various processes whereby new words are formed from existing words (or "roots").
- Lyons (2004), Pag. 15