1. to give the impression of not being worried, bothered, or interested in something
He tried to appear unconcerned about the criticism, but his facial expression betrayed him.
Ele tentou parecer desinteressado pela crítica, mas sua expressão facial o traiu.
2. to act or seem indifferent or nonchalant despite potential concerns
She appeared unconcerned when the boss announced the layoffs.
Ela aparentou indiferença quando o chefe anunciou as demissões.