Etymograph

English

senior

Senior comes from Latin senior ‘older’, from senex ‘old’, and ultimately from Proto-Indo-European *sénos.

  1. Proto-Indo-Europeanc. 4500–2500 BCE*sénos1‘old’reconstructed
  2. Proto-Italicc. 1500–700 BCE*seneks1reconstructed
  3. Latinc. 75 BCE–200 CEsenex2‘old’
  4. Latinc. 75 BCE–200 CEsenior2‘older’comparative form of senex
  5. Middle Englishc. 1150–1500senior2
  6. Englishearliest quotation 1526senior2

attested reconstructed ? uncertain or disputed deepest recorded ancestor

  1. 1 Wiktionary, Latin senex
  2. 2 Wiktionary, English senior
  3. Earliest quotation in Wiktionary’s entry: 1526, [William Tyndale, The Newe Testamẽt […] (Tyndale Bible): “Then Peter full of the holy gooſt ſayd vnto…”.

Lineage

  1. Proto-Indo-Europeanc. 4500–2500 BCE*sénosWiktionary, Latin senex‘old’reconstructed
  2. Proto-Italicc. 1500–700 BCE*seneksWiktionary, Latin senexreconstructed
  3. Latinc. 75 BCE–200 CEsenexWiktionary, English senior‘old’
  4. Latinc. 75 BCE–200 CEseniorWiktionary, English senior‘older’comparative form of senex
  5. Middle Englishc. 1150–1500seniorWiktionary, English senior
  6. Englishearliest quotation 1526seniorWiktionary, English senior. Earliest quotation in Wiktionary’s entry: 1526, [William Tyndale, The Newe Testamẽt […] (Tyndale Bible): “Then Peter full of the holy gooſt ſayd vnto…”

Word family

English words that share an ancestor with senior, grouped by the ancestor they share, most familiar first.

through Proto-Italic *seneks

  • senatorial ← senātōrius ← senātor ← senātus ← senex

through Latin senex ‘old’

through Latin senior ‘older’

25 more relatives in the full family tree

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Today it means

adj Older.

Sources

Sources: Wiktionary, “senior”; the older steps come from the Wiktionary entry for Latin senex. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.

Etymograph / Proto-Indo-European *sénos / senior