tenuity

How can we imagine such powerful resilience combined with such extreme tenuity?

From Through Nature to God by John Fiske

Birch branches are to be preferred on account of their tenuity.

From Gas-Engines and Producer-Gas Plants A Practice Treatise Setting Forth the Principles of Gas-Engines and Producer Design, the Selection and Installation of an Engine, Conditions of Perfect Operation, Producer-Gas Engines and Their Possibilities, the Care of Gas-Engines and Producer-Gas Plants, with a Chapter on Volatile Hydrocarbon and Oil Engines by R. E. Mathot

The bond between the States is of amazing tenuity.

From From Sea to Sea Letters of Travel by Rudyard Kipling

The golden panicles of the great Quake-grass, so curiously compacted and hanging in stalks of so hair-like a tenuity as to nod and tremble with the slightest motion, how beautiful are these!

From The Romance of Natural History, Second Series by Philip Henry Gosse

The atmosphere, because of its great tenuity, mobility and comparative imponderability, presents little resistance to bodies passing through it at low velocities.

From Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 5 "Fleury, Claude" to "Foraker" by Various