hellproof

English

Etymology

hell +‎ -proof

Adjective

hellproof (comparative more hellproof, superlative most hellproof)

1. Resistant to hell.
   • 1936, American Society for Testing and Materials, Proceedings, volume 36, number 2, page 9:

     A short while after we had published our early experiments with quartz glass, a man in Southern Virginia wrote to suggest that there might be mutual profit for him and for me if we would consider making silica-glass coffins which, he said, ought to be hellproof.