1. (a.) Not capable of being broken or separated into parts; as, infrangible atoms.

2. (a.) Not to be infringed or violated.

chip-proof coherent cohesive firm firm as Gibraltar fractureproof impartible indiscerptible indissoluble indissolvable indivisible infusible inseparable insoluble made of iron nonbreakable rigid shatterproof solid sound stable staunch stout sturdy unbreakable undividable unified unshatterable