senior
The word senior is like being the biggest tree in a garden. Just like how a big tree has been around for a long time, a senior person has lived and learned a lot more than others who are younger. They have seen many seasons and have lots of stories to tell about their experiences.
Think of a wise owl sitting high up in a tree. This owl has been around for a long time, so it knows a lot about the forest. A senior person is like that owl. They have knowledge and wisdom because they have experienced many things in life.
Imagine a captain of a ship. The captain has sailed through many storms and sunny days. They know how to guide the ship safely because they have done it many times before. A senior person is like the captain, guiding others with their experience.
Consider a grandparent who knows all the best recipes and stories. They have cooked many meals and have lots of stories to share. A senior person is like a grandparent, full of memories and lessons to share with younger people.