ironlike

He became quicker of movement than the other dogs, swifter of foot, craftier, deadlier, more lithe, more lean with ironlike muscle and sinew, more enduring, more cruel, more ferocious, and more intelligent.

The Outcast 2010

Fang “became quicker of movement than the other dogs, swifter of foot, craftier, deadlier, more lithe, more lean with ironlike muscle and sinew, more enduring, more cruel, more ferocious, and more intelligent.”

Le Milieu, Le Moment, La Race: Literary Naturalism in Jack London's White Fang 2010

Nylan didn't feel that ironlike, not at all, and he wondered again how long before the shoulder would heal completely.

The Chaos Balance Modesitt, L. E. 1997

'I will kill this bull/he muttered, bearing down with all the force of his ironlike body.

Mexico Michener, James 1992

His ironlike nails raked her back, tearing open the copper mesh dress.

Riverwind the Plainsman Thompson, Paul B. 1990

Among the trees reared a broken domelike structure, built of gigantic blocks of the peculiar ironlike green stone found only on the islands of Vilayet.

Conan the Wanderer Howard, Robert E. 1974

A single false turn of the wheel, and the _Searcher_ would have been dashed to atoms against the ironlike rocks on each side, above, and below.

The Wizard of the Sea A Trip Under the Ocean Roy Rockwood

The other was a great, grey man whom age apparently had not weakened but rather settled and hardened into an ironlike durability; the winds of time or misfortune would have to break that stanch oak before it would bend.

Trailin'! Max Brand 1918

His uniform, creased and stained, and now silvery with dew, flapped about a gaunt ironlike frame; and from under the leather peak of his kepi, even in his fever, his eyes burned steady and compelling.

The Happy End Joseph Hergesheimer 1917

He became quicker of movement than the other dogs, swifter of foot, craftier, deadlier, more lithe, more lean with ironlike muscle and sinew, more enduring, more cruel, more ferocious, and more intelligent.

The Outcast 1906