| 1. | "Eight years you must be tenacious of life. - from Jane Eyre by Charlotte Bronte |
| 2. | He is as brave as a bulldog and as tenacious as a lobster if he gets his claws upon anyone. - from The Adventures of Sherlock Holmes by Arthur Conan Doyle |
| 3. | "That is a tenacious old grandfather," said Beauchamp. - from The Count of Monte Cristo by Alexandre Dumas, Pere |
| 4. | The most curious were baffled by her silence and the most tenacious by her obstinacy. - from Les Miserables by Victor Hugo |
| 5. | While earnestly wishing to erase from his mind the trace of my former offence, I had stamped on that tenacious surface another and far deeper impression, I had burnt it in. - from Jane Eyre by Charlotte Bronte |
| 6. | The cardinal has a tenacious memory and a long arm you may depend upon it, he will repay you by some ill turn.. - from The Three Musketeers by Alexandre Dumas, Pere |
| 7. | But the constitution of joint-stock companies renders them in general, more tenacious of established rules than any private copartnery. - from An Inquiry into the Nature and Causes of the Wealth of Nations by Adam Smith |
| 8. | One with tenacious organs holds in love And clinging lust the world in its embraces The other strongly sweeps, this dust above, Into the high ancestral spaces. - from Faust by Johann Wolfgang Von Goethe |
| 9. | Wellington was tenacious in that lay his merit, and we are not seeking to lessen it but the least of his foot-soldiers and of his cavalry would have been as solid as he. - from Les Miserables by Victor Hugo |