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From con- +‎ (go).



coeō (present infinitive coīre, perfect active coiī, supine coitum); irregular conjugation

  1. I assemble, meet, come together.
    in triclinio coeam, in cubiculo nolamI meet (you) at the table but I won’t at the dormitory
  2. I encounter, come up against.
  3. I copulate.
  4. I join, ally with.
  5. I unite, come together as a whole.
  6. I mass together, ball up, curdle.


Irregular conjugation, but similar to fourth conjugation. The second principal part is most often contracted to coiī, but occasionally appears as coīvī.

   Conjugation of coeo (irregular)
indicative singular plural
first second third first second third
active present coeō coīs coit coīmus coītis coeunt
imperfect coībam coībās coībat coībāmus coībātis coībant
future coībō coībis coībit coībimus coībitis coībunt
perfect coiī, coīvī coīstī, coīvistī coiit, coīvit coiimus coīstis coiērunt, coiēre
pluperfect coieram coierās coierat coierāmus coierātis coierant
future perfect coierō coieris coierit coierimus coieritis coierint
passive present coeor coīris, coīre coītur coīmur coīminī coeuntur
imperfect coībar coībāris, coībāre coībātur coībāmur coībāminī coībantur
future coībor coīberis, coībere coībitur coībimur coībiminī coībuntur
perfect coitus + present active indicative of sum
pluperfect coitus + imperfect active indicative of sum
future perfect coitus + future active indicative of sum
subjunctive singular plural
first second third first second third
active present coeam coeās coeat coeāmus coeātis coeant
imperfect coīrem coīrēs coīret coīrēmus coīrētis coīrent
perfect coierim coierīs coierit coierimus coieritis coierint
pluperfect coīssem coīssēs coīsset coīssēmus coīssētis coīssent
passive present coear coeāris, coeāre coeātur coeāmur coeāminī coeantur
imperfect coīrer coīrēris, coīrēre coīrētur coīrēmur coīrēminī coīrentur
perfect coitus + present active subjunctive of sum
pluperfect coitus + imperfect active subjunctive of sum
imperative singular plural
first second third first second third
active present coī coīte
future coītō coītō coītōte coeuntō
passive present coīre coīminī
future coītor coītor coeuntor
non-finite forms active passive
present perfect future present perfect future
infinitives coīre coīsse coitūrus esse coīrī coitus esse coitum īrī
participles coiēns coitūrus coitus coeundus
verbal nouns gerund supine
nominative genitive dative/ablative accusative accusative ablative
coīre coeundī coeundō coeundum coitum coitū

Derived terms[edit]

Related terms[edit]


  • coeo in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • coeo in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers