filia

Filia is a Latin noun meaning "daughter." It is feminine and belongs to the first declension. In classical Latin, filia designates a female offspring within a family, and it appears in phrases and narratives involving kinship. The masculine counterpart is filius, meaning "son."

In English, the adjective filial derives from filia and filius and is used to describe relationships or duties of a child toward a parent. Common phrases include filial piety and filial duties, which refer to moral obligations toward one's parents or ancestors. The term also surfaces in legal, historical, and literary contexts when describing family lineage or succession. In Romance languages, cognate forms survive: Italian figlia, Spanish hija, and French fille.

Filia should not be confused with philia, a Greek term meaning friendship or affection. Although both roots relate to social bonds, filia is Latin for daughter, whereas philia describes fondness or affinity. The distinction is important in linguistic and classical studies.