From un- + faultable. <span class="searchmatch">unfaultable</span> (comparative more <span class="searchmatch">unfaultable</span>, superlative most <span class="searchmatch">unfaultable</span>) Not capable of being faulted; with which no fault can...
faultable, superlative most faultable) Capable of being faulted, or found fault with. Liable to faults; having the potential to fail or go wrong. <span class="searchmatch">unfaultable</span>...