nonchalant

Definitions

Feeling or appearing casually calm and relaxed; not displaying anxiety, interest, or enthusiasm.

Marked by a lack of concern or indifference.

Examples

He tried to appear nonchalant, even though he was incredibly nervous about the interview.

Despite the chaos unfolding around her, she remained completely nonchalant and continued reading her book.

Synonyms

indifferent unconcerned casual composed aloof detached unruffled

Antonyms

anxious concerned enthusiastic nervous passionate agitated worried