Apathetic is a synonym of impassive.
As adjectives the difference between impassive and apathetic
is that impassive is having, or revealing, no emotion while apathetic is void of feeling; not susceptible of deep emotion; passionless; indifferent.
impassive
English
Adjective
(
en adjective)
Having, or revealing, no emotion.
Still or motionless.
Synonyms
* apathetic, phlegmatic
apathetic
English
Alternative forms
* apathetical
Adjective
(
en adjective)
Void of feeling; not susceptible of deep emotion; passionless; indifferent.
Of, or pertaining to apatheism.
Synonyms
* indifferent. impassive
Related terms
* apatheism
* apatheist