Etymologically

Etymology and origin of the Latin word initus

Confidence
Established
Formation
Derivation
First attested
96–55 BC, Lucretius
Ultimate origin
Latin eō
Etymology tree
inherited borrowed derived
Latin ineo
Latin initus
From the same root
Latin initium ← ineo

Pronunciation

  • Classical: [ˈɪ.nɪ.tʊs], [ˈɪ.nɪ.tuːs][1]
  • Ecclesiastical: [ˈiː.ni.tus], [ˈiː.ni.tus][1]

Forms

initus m (genitive initūs); fourth declension[1]

Etymology

It is from Latin ineō (“to go in, enter”) + -tus,[2][1] an action noun of the fourth declension.[2][3] The verb is a compound of in- and eō1 (“to go”),[1] which goes back to Proto-Indo-European *h₁ei- (“to go”).[4]

Earliest recorded meaning

Köbler records it first in Lucretius,[5] who uses it of the arrival of the goddess, which the birds announce,[3] and of the beginning of motion.[2][3]

Semantic evolution

Its senses are “entry, approach” and “beginning”.[2][3] Ovid and Pliny the Elder use it of the mounting or covering of a female animal: Pliny says that a horse cannot bear fifteen coverings in the same year.[2][3] Gellius quotes it in a figurative sense, of entering the feelings.[2]

Timeline

  • 96–55 BC – Lucretius uses it of an arrival and of the start of motion.[2][3][5]
  • 43 BC–18 AD – Ovid uses it of mating.[3][5]
  • 23/24–79 AD – Pliny the Elder uses it of the covering of animals.[2][3][5]
  • c. 165 AD – Gellius quotes it in a figurative sense.[2][5]

Meanings

Noun

  1. Entry, approach, arrival.[2][3]
  2. Beginning, commencement.[2][3]
  3. The covering or mounting of a female animal.[2][3]

Usage notes

The same form is the perfect participle of ineō, “entered upon, begun”.[3][6]

References

  1. ^ a b c d e Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k l Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  3. ^ a b c d e f g h i j k l Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  4. ^ de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  5. ^ a b c d e Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  6. ^ Stelten, Leo F. (1995), Dictionary of Ecclesiastical Latin, Peabody, Mass.: Hendrickson
Cite this entry

“Initus.” Etymologically, 20 Oct. 2026, etymologically.com/la/initus. Accessed 22 Oct. 2026.

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