noun

1. any of certain large, thick-skinned, hoofed animals, as the elephant, rhinoceros, and hippopotamus, formerly classified together
2. a thick-skinned, insensitive, stolid person

Etymology: Fr pachyderme < Gr pachydermos, thick-skinned < pachys, thick (< IE base *bhenĝh-, thick, dense > Sans bahú-, dense, much) + derma, skin: see derma