Definition of "infrangible" [in•fran•gi•ble]

• Difficult or impossible to break or separate into parts. (adjective)
• Inviolable: infrangible human rights. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "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."
• "That is an infrangible prerequisite for any agreement."
• "She observed her stern face as if it belonged to a stranger, the lady of a noble house, a woman whose control was infrangible."