ironclad

Synonyms for ironclad

adj fixed, rigid

adjective. inflexible

1852, of warships, American English, from iron (n.) + clad. Of contracts, etc., 1884. As a noun meaning "iron-clad ship," it is attested from 1862.

First of all I'd have to tie Josephine Francis down with an ironclad contract.

You might go so far as t' give that bellerin' ironclad a toot.'

The ironclad seemed to rebound and tremble for a moment, and then passed on.

The vessel described was the Miantonoma, an American ironclad turret-ship.

A monster Russian ironclad, it was said, lay somewhere “outside.”

These officials and other employees must take the "ironclad" oath.

But the chief hope of the attack was placed upon the ironclad.

And, like the Cut-Leaved Birch, it is ironclad in its hardiness.

I received the present of an ironclad at the hands of a British Colony.

It was Admiral Porter's fleet of ironclad turtles, steamboats, and barges.