Main Entry: fil·ial

Pronunciation: \ˈfi-lē-əl, ˈfil-yəl\

Function: adjective

Etymology: Middle English, from Late Latin filialis, from Latin filius son — more at feminine

Date: 14th century

1 : of, relating to, or befitting a son or daughter <filial obedience>
2 : having or assuming the relation of a child or offspring

— fil·ial·ly \-lē-ə-lē, -yə-lē\ adverb