Unresponsive is a related term of undemonstrative.
As adjectives the difference between unresponsive and undemonstrative
is that unresponsive is not responsive; unreactive while undemonstrative is not given to showing emotion or feelings; reserved or distant.
unresponsive
English
Adjective
(
en adjective)
Not responsive; unreactive.
Indifferent or apathetic; emotionless.
Synonyms
* nonresponsive
Antonyms
* responsive