undurable Antonyms

untraversable strong-arm feast day windtight weatherproof unpassable unflexible undestroyable tuff toughish stock-still statics stabled spiked shellproof leakproof leatherlike light-tight semirigid rodlike rock steady stonelike rainproof precast unattackable age-long solid-state nonporous unmodifiable firmware raincoat bulletproof robustious rheumatic resistive gastight freck fiducial ferric dure diuturnal diurnal coriaceous buttressed built buckram ballproof arthritic appressed granitic