nonchalant [adjective]
Definition of nonchalant:
1. marked by blithe unconcern
2. Not showing concern, interest, or enthusiasm; indifferent.
3. Casual and relaxed in a way that suggests a lack of concern.
4. Showing a studied indifference, typically to conceal anxiety or other strong emotion.
Synonyms of nonchalant:
Sentence/Example of nonchalant:
1. They are ostentatiously nonchalant, disinclined to become too involved, at least to begin with.
2. She was nonchalant about the whole thing.
3. He strolled into the room with a nonchalant air.
4. She tried to maintain a nonchalant expression, but her eyes gave her away.