PACHYDERMATOUS
callous, indurate, pachydermatous
(adjective) emotionally hardened; “a callous indifference to suffering”; “cold-blooded and indurate to public opinion”
pachydermatous, pachydermal, pachydermic, pachydermous
(adjective) of or relating to or characteristic of pachyderms
Source: WordNet® 3.1
Etymology
Adjective
pachydermatous (comparative more pachydermatous, superlative most pachydermatous)
Of or relating to the pachyderms.
(humorous) Thick-skinned; insensitive.
Source: Wiktionary
Pach`y*der"ma*tous, a.
1. (Zoöl.) Of or pertaining to the pachyderms.
2. Thick-skinned; not sensitive to ridicule.
Source: Webster’s Unabridged Dictionary 1913 Edition