Nonchalant (adj.)
By Patrick Saffer
Definition
Not showing any concern or worry
Synonym
Calm
Unconcerned
Composed
Antonyms
Anxious
Concerned
Interested
Sentences
The man nonchalantly walked down the middle of the street without a care in the world
The child answered the teacher with a nonchalantly answer of "yeah".
Alright, so you're nonchalant.