Carefree (adjective)

Free from care, worry, or responsibility; easygoing and relaxed.

Origin:

1842, from care + free.

Examples:

1. The carefree days of summer are a time to relax and enjoy yourself.
2. He had a carefree attitude and didn't worry about anything.
3. The carefree lifestyle is not suitable for everyone.
4. He was always carefree and happy.
5. The carefree person is one that doesn't worry about the future.