He seemed unconcerned about the outcome of the project.
unconcerned with
Frequency:
70
%
She was unconcerned with the opinions of others.
unconcerned attitude
Frequency:
60
%
Her unconcerned attitude towards the situation surprised everyone.
unconcerned manner
Frequency:
50
%
He spoke in an unconcerned manner, as if nothing could faze him.
Idiomatic Expressions for unconcerned
Phrase: unconcerned attitude
Meaning: a lack of worry or care about a situation
Usage: Despite the chaos around him, he maintained an unconcerned attitude.