...tenaz, tenacious, firm, constant, fixed... 
Gustavo Adolfo Becquer 「Legends, Tales and Poems」
... The governor was obliged to be satisfied with these explanations, but he was still tenacious...
Alexandre Dumas, Pere 「The Man in the Iron Mask」
...He remembered, too, how sweetly she had smelled and the very perfume she had used, a perfume as of lilac—for memory is singularly tenacious in these matters...
Rafael Sabatini 「Scaramouche」
... The slushy mire of the savannahs rendered marching a work of great difficulty; its tenacious hold of the feet told terribly on men and animals...
Henry M. Stanley 「How I Found Livingstone」
... Mahomet was a regular Cairo dragoman, a native of Dongola, almost black, but exceedingly tenacious regarding his shade of color, which he declared to be light brown...
Samuel White Baker 「In the Heart of Africa」
...They are very tenacious of life, and belong, without doubt, tothose fishes which in Ceylon descend during the drought into themuddy soil...
J. Emerson Tennent 「Sketches of the Natural History of Ceylon」
..." He also says theyare very tenacious of life, bearing long abstinence with apparentease; when alarmed they roll themselves up into a ball like theEuropean species...
Robert A. Sterndale 「Natural History of the Mammalia of India and Ceylon」
...It is surprising, however, how tenacious of life these animals are...
A. R. (Arthur Robert) Harding 「Wolf and Coyote Trapping」
...At birth the bowels of the calf contain the meconium, a tenacious, gluey,brownish-yellow material largely derived from the liver, which must be expelledbefore they can start their functions normally...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...I would mask these effluvia, stifle themunder a powerful, tenacious odour, which would take complete possessionof the sense-organ and neutralise the less powerful impression...
J. H. Fabre Bernard Miall 「Social Life in the Insect World」
...Frequently,perhaps more often than not, the ground is covered with grass, aboveall with couch-grass, whose tenacious rootlets form an inextricablenetwork below the surface...
Jean Henri Fabre Alexander Teixeira de Mattos 「The Glow-Worm and Other Beetles」
...When excited, it isnot easily appeased, and is exceedingly tenacious of injury, alwaysshowing great fierceness whenever any one approaches who has chanced toprovoke it...
George Vasey 「Delineations of the Ox Tribe」
...In the case of femaleinsects which have not yet deposited their eggs, and areconsequently exceedingly tenacious of life, a longer time will befound necessary...
Montagu Browne 「Practical Taxidermy」
ランダム例文：
vaccinated iceberg diplomats
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