imperviable,"['impervious', 'fast ', 'acidfast ', 'colorfast ', 'greaseproof ', 'mothproof ', 'mothresistant ', 'proof ', 'resistant ', 'corrosionresistant ', 'rotresistant ', 'runproof ', 'ladderproof ', 'runresistant ', 'soundproof ', 'impermeable ', 'pervious ']"