nonchalant | nonchalantly | nonchalance

The word ‘nonchalant’ expresses an air of easy unconcern or casualness that suggests indifference or unconcern, even if that is not genuinely felt. In a professional environment, nonchalance is negative, being associated with carelessness and a lack of effort. In a social context, it may be regarded as being cool or collected.

1. The politician’s nonchalant response to the crisis made the situation a lot worse than it needed to be.
2. We’re trying to make an important deadline and Jenny is laughing and joking. Her nonchalance really annoys me!
3. I expected Tom to be nervous when delivering his sales pitch, but he did it so nonchalantly you’d think he wasn’t the least bit concerned!