Consider this: We English-speaking humans use various gender-specific and gender-neutral terms to describe familial relationships. The two people who mated and produced us are our parents (gender-neutral) or our mother and father (gender-specific). We are their children (gender-neutral) or their sons and daughters (gender-specific). If our parents produced other offspring, they are our siblings (gender-neutral) or our brothers and sisters (gender-specific).

But if our parents have siblings, they are our aunts and uncles. There's no gender-neutral term to describe that relationship. And if our siblings have children, they are our nieces and nephews. Again, there's no gender-neutral term to describe the relationship.

But if our gender-specific aunts or uncles have children, they are only our gender-neutral cousins. We have to specify whether they're male or female.

Well, it's obvious to me that we need some new words.