(ˈ)im+ adjective
Etymology: Latin impervius, from in- in- (I) + pervius pervious — more at pervious
1.
a. : not allowing entrance or passage through : impenetrable
waterproofed so that the coat was impervious to rain
a steel impervious to bullets
b. : not capable of being damaged or harmed
a carpet material impervious to most rough treatment
2. : not capable of being affected or disturbed
a man impervious to criticism
looked at her, impervious to her tears — Jean Stafford
: not open
impervious to arguments or facts
• im·pervi·ously “+ adverb
• im·perviousness “+ noun