Words: troglodytical [MW]

Function: noun
Etymology: Latin troglodytae, plural, from Greek trOglodytai, from trOglE hole, cave (akin to Greek trOgein to gnaw) + dyein to enter
1 : a member of a primitive people dwelling in caves
2 : a person resembling a troglodyte (as in reclusive habits or outmoded or reactionary attitudes)
- trog·lo·dyt·ic adjective