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filius: all forms

filius means “son”. Below is its full declension in Latin.

Forms

Forms, singular
Masculine
Nominativefilius
Genitivefilii · fili
Dativefilio
Accusativefilium
Ablativefilio
Vocativefili
Locativefilii
Forms, plural
Masculine
Nominativefilii
Genitivefiliorum
Dativefiliis
Accusativefilios
Ablativefiliis
Vocativefilii
Locativefiliis

Meaning and examples of filius

Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Lewis & Short, A Latin Dictionary (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.