From un- + dentable. <span class="searchmatch">undentable</span> (not comparable) Not dentable; impossible to dent. 1933, Robert Earle Galbraith, These our moderns: Mr. Plick was an inventor...
useful to observe that a nonempty bounded set C is dentable if its closed convex hull is dentable... <span class="searchmatch">undentable</span> dentability bandelet, end table, entabled...