Filial
Part of speech: adjective
Definition: Pertaining to or befitting a son or daughter. Respectful of the duties and attitudes of a son or daughter toward their parents. Of a generation or generations descending from a specific previous one.
Relation
Part of speech: noun
Definition: The manner in which two things may be associated.A member of one's family.The act of relating a story.A set of ordered tuples.Specifically, a set of ordered pairs.A set of ordered tuples retrievable by a relational database; a table.A statement of equality of two products of generators, used in the presentation of a group.
Example sentence: A good friend is my nearest relation.