Meaning: A noun, insouciance refers to a feeling of careless indifference. It is a lack of concern shown by someone towards something they might be expected to take seriously
Origin: Originating from the French insouciant in the late 18th Century, the word is a combination of the negative prefix in– and soucier, meaning "to worry or disturb." Soucier in turn came from the Latin sollicitus meaning "anxious". The word "insouciance" has been part of the English language since the 1800s.
Usage: She entered the meeting hall with complete insouciance to the fact that she was late.
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