In encountering with new words and names, Ferdowsi has tried to give definitions and origins of the meaning. Sometimes, in his great book the etymology of the words is presented based on physical word-form and taking advantage of literary devices. By this, it is meant that Ferdowsi has felt free to make literary innovations and artistic inventions in some words, names and constructions by using lexical and semantic devices such as asteismus, etiologia, derivation and quasi-derivation.Furthermore, he has occasionally described semantic aspects of names and terms and has clearly explained their true concepts regardless of etymology, which shows his thorough knowledge of language, philology and main references.The article tries to show Ferdowsi's artistic handling of etymology and semantics on a descriptive basis.