Your relatives are the members of your family.

You use relative to say that something is true to a certain degree, especially when compared with other things of the same kind.

You use relative when you are comparing the quality or size of two things.

Relative to something means with reference to it or in comparison with it.

If you say that something is relative, you mean that it needs to be considered and judged in relation to other things.

If one animal, plant, language, or invention is a relative of another, they have both developed from the same type of animal, plant, language, or invention.