As adjectives the difference between unresponsive and impassive
is that unresponsive is not responsive; unreactive while impassive is having, or revealing, no emotion.
unresponsive
English
Adjective
(
en adjective)
Not responsive; unreactive.
Indifferent or apathetic; emotionless.
Synonyms
* nonresponsive
Antonyms
* responsive
impassive
English
Adjective
(
en adjective)
Having, or revealing, no emotion.
Still or motionless.
Synonyms
* apathetic, phlegmatic