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• s  difficult or impossible to break or separate into parts
  an infrangible series
• s  not capable of being violated or infringed
  infrangible human rights

• As much as anything, membership in the club means membership in an infrangible fraternity of one's peers.
• Its flat, posterish colors will read with infrangible aplomb.
• As much as anything, membership in the club means membership in an infrangible fraternity of one's peers.

• absolute
• inviolable