What is the synonym of the word ‘Indifferent’?

Indifferent (adj):
Meaning -  having or showing no interest in somebody/something; Having no particular interest or sympathy; unconcerned.
বাংলা অর্থ - উদাসীন।
Synonym: apathetic, unconcerned, careless etc.
Antonym: heedful, caring, enthusiastic etc

Source: Oxford Dictionary