insouciant

Insouciant is an adjective derived from the French word "insouciance," meaning a state of not worrying or being unconcerned. It describes a person or their manner that is characterized by a carefree, lighthearted, and nonchalant attitude. Someone described as insouciant often displays a lack of worry or anxiety, even in situations that might typically cause stress or concern. This can manifest as a relaxed demeanor, an easygoing disposition, or a general air of casualness. The term suggests a deliberate or natural absence of excessive care, implying a degree of self-possession and freedom from burdensome thoughts. It is not necessarily a sign of irresponsibility, but rather a way of approaching life with a calm and untroubled spirit. The opposite of insouciant would be worried, anxious, or deeply concerned.