Undemonstrative is a related term of impervious.
As adjectives the difference between undemonstrative and impervious
is that undemonstrative
is not given to showing emotion or feelings; reserved or distant while impervious
is unaffected or unable to be affected by.
not given to showing emotion or feelings; reserved or distant
Unaffected or unable to be affected by.
, title=(The Celebrity
, passage=Although the Celebrity was almost impervious
to sarcasm, he was now beginning to exhibit visible signs of uneasiness, the consciousness dawning upon him that his eccentricity was not receiving the ovation it merited.}}
Preventive of any penetration; impenetrable, impermeable, particularly of water.
Immune to damage or effect.