infrangible

Here Vulcan forged those infrangible chains, that impenetrable armor—the shield of Achilles and the sword of Hector.

The fine but infrangible threads of our destiny are spun and woven out of atom-fibres indelibly stamped with the previous owners' names.

The nuptial life is attended with peculiar aggravations, since the tie is infrangible, and the choice of a more suitable companion, if such a one should offer, is for ever precluded.

But in every shape, they are, on account of their solidity, infrangible, or incapable of actual division.

The logic was perfect, and it seemed but another link in the infrangible chain of events, when she found another letter waiting for her at the office of the Synthesis.