This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Difficult or impossible to break or separate into parts.

adj. Inviolable: infrangible human rights.

adj. Unbreakable, indestructible, or very difficult to break.

adj. Not capable of being broken or separated into parts.

adj. Not to be infringed or violated.

Not capable of being broken or separated into parts.

Not to be violated or infringed; inviolable: as, an infrangible oath.

adj. difficult or impossible to break or separate into parts

adj. not capable of being violated or infringed

"The black tower reared out of the mist so suddenly that his first realization of its presence was to scrape his palms -instinctively flung forward-against its cold infrangible scales."

unbreakable    inalienable    unalienable