5-09. child, children.
[X is a child.] = X is a person or an animal. X is alive because two other living things existed before X existed. They were the same kind of living thing as X. They did something that caused X to exist. X was small at this time, but after some time, X can become big.
[I have one child.]
[These two people held their two children.]
[X is female.] = People and many kinds of animals are like this: When two animals cause a child to exist, their child is alive inside the body of one of these two animals for some time. X is like the one that can have a child live inside its body.
[There are two female animals here.]
[X is male.] = When two people or animals cause a child to exist, one of these two is female and the other one is not female. X is like the one that is not female.
[I have two children: One is male and the other is female.]
5-12. parent, parents, parent of, parents of.
[J and K are the parents of X.] = J and K are two people or animals. One is male and one is female. X is their child.
[One of my parents is alive, but the other died when I was small.]
Here is a group of three animals.
One of the big animals is female, and the other big animal is male.
The small animal is their child.
The two big animals __________.