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- Even when dislodged, he still kept the letter in his mouth; and on my endeavouring to take it from him, at the imminent risk of being bitten, he kept it between his teeth so pertinaciously as to suffer himself to be held suspended in the air by means of the document.Chapters 37-39 (29% in)
- On this occasion he seemed to think he was introduced expressly to keep Traddles at bay; and he barked at my old friend, and made short runs at his plate, with such undaunted pertinacity, that he may be said to have engrossed the conversation.Chapters 43-45 (42% in)
There are no more uses of "pertinacious" in David Copperfield.
Typical Usage (best examples)