Eskimo kinship is a way of describing family relationships among Inuit people. It helps them understand how they're related and how they should treat each other.
Imagine you have a brother named Jack. You and Jack have the same parents, so you call Jack your "brother." But imagine your mom and dad also had a special friend named Joe, and Joe had a daughter named Julie. Julie would be your "sister" even though she's not really your mom and dad's child. That's how Eskimo kinship works!
In Eskimo kinship, people are grouped into specific categories. For example, your mom, her sisters, and their female children are all in one group called "your mother's sister." Your dad, his brothers, and their male children are in a group called "your father's brother." These groups are really important because they help you figure out who your relatives are and how you should treat them.
Eskimo kinship is a little different from how some other cultures look at family relationships. But for Inuit people, it's a very important way of understanding who their family is.