Sentence:  Cabell also uses a kind of stylistic dissonance to reinforce his novel's thematic ironies at the sentence level. An inflated speech in <WSD>archaic</WSD> language might end with a modern pinprick: "And so on, and so on!" 
Meaning of the word marked with <WSD> tags:  No longer in ordinary use, though still used occasionally to give a sense of antiquity.