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LATIN · A WORD WITH POSSIBILITIES

filius.

a son

6 characters2 syllables approx.Latina language

Meaning & usage

noun[ˈfiː.li.ʊs]Classical-Latin[ˈfiː.li.us]

  1. a son

    declension-2
    Ubī̆ est noster fīlius?

  2. any male descendant

    broadly · declension-2

  3. children

    declension-2 · in-plural
Where this word comes from

Etymology tree Proto-Indo-European *dʰeh₁(y)- Proto-Indo-European *-yós Proto-Indo-European *dʰh₁ilyós Proto-Italic *θīlios Proto-Italic *fīlios Latin filius Inherited from Proto-Italic *fīlios, *feilios (the Latin can reflect either one, but Faliscan 𐌅𐌉𐌋𐌄𐌏 (fīleo, hīleo), if original and not modeled on Latin fīlius, would point to *fīl-), from earlier *θeilios, from *dʰeh₁i-l-yo-s (“sucker”), a derivation from the verbal root *dʰeh₁(y)- (“to suck”). Related to fellō, fēmina, fētus, Old English delu (“nipple, teat”), dēon (“to suck, suckle”), Old Armenian դալ (dal). More at doe.

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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.

Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.