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  1. (obsolete) first-person singular present indicative of cognoscere



From con- (with) +‎ (g)nōscō (know).



cōgnōscō (present infinitive cōgnōscere, perfect active cōgnōvī, supine cōgnitum); third conjugation

  1. I learn, I am acquainted (with), I recognize
  2. (in perfect tense) I know


   Conjugation of cognosco (third conjugation)
indicative singular plural
first second third first second third
active present cōgnōscō cōgnōscis cōgnōscit cōgnōscimus cōgnōscitis cōgnōscunt
imperfect cōgnōscēbam cōgnōscēbās cōgnōscēbat cōgnōscēbāmus cōgnōscēbātis cōgnōscēbant
future cōgnōscam cōgnōscēs cōgnōscet cōgnōscēmus cōgnōscētis cōgnōscent
perfect cōgnōvī cōgnōvistī, cōgnōsti1 cōgnōvit cōgnōvimus cōgnōvistis, cōgnōstis1 cōgnōvērunt, cōgnōvēre
pluperfect cōgnōveram cōgnōverās cōgnōverat cōgnōverāmus cōgnōverātis cōgnōverant
future perfect cōgnōverō cōgnōveris cōgnōverit cōgnōverimus cōgnōveritis cōgnōverint
passive present cōgnōscor cōgnōsceris, cōgnōscere cōgnōscitur cōgnōscimur cōgnōsciminī cōgnōscuntur
imperfect cōgnōscēbar cōgnōscēbāris, cōgnōscēbāre cōgnōscēbātur cōgnōscēbāmur cōgnōscēbāminī cōgnōscēbantur
future cōgnōscar cōgnōscēris, cōgnōscēre cōgnōscētur cōgnōscēmur cōgnōscēminī cōgnōscentur
perfect cōgnitus + present active indicative of sum
pluperfect cōgnitus + imperfect active indicative of sum
future perfect cōgnitus + future active indicative of sum
subjunctive singular plural
first second third first second third
active present cōgnōscam cōgnōscās cōgnōscat cōgnōscāmus cōgnōscātis cōgnōscant
imperfect cōgnōscerem cōgnōscerēs cōgnōsceret cōgnōscerēmus cōgnōscerētis cōgnōscerent
perfect cōgnōverim cōgnōverīs cōgnōverit cōgnōverīmus cōgnōverītis cōgnōverint
pluperfect cōgnōvissem, cōgnōssem1 cōgnōvissēs, cōgnōsses1 cōgnōvisset, cōgnōsset1 cōgnōvissēmus, cōgnōssemus1 cōgnōvissētis, cōgnōssetis1 cōgnōvissent, cōgnōssent1
passive present cōgnōscar cōgnōscāris, cōgnōscāre cōgnōscātur cōgnōscāmur cōgnōscāminī cōgnōscantur
imperfect cōgnōscerer cōgnōscerēris, cōgnōscerēre cōgnōscerētur cōgnōscerēmur cōgnōscerēminī cōgnōscerentur
perfect cōgnitus + present active subjunctive of sum
pluperfect cōgnitus + imperfect active subjunctive of sum
imperative singular plural
first second third first second third
active present cōgnōsce cōgnōscite
future cōgnōscitō cōgnōscitō cōgnōscitōte cōgnōscuntō
passive present cōgnōscere cōgnōsciminī
future cōgnōscitor cōgnōscitor cōgnōscuntor
non-finite forms active passive
present perfect future present perfect future
infinitives cōgnōscere cōgnōvisse, cōgnōsse1 cōgnitūrus esse cōgnōscī cōgnitus esse cōgnitum īrī
participles cōgnōscēns cōgnitūrus cōgnitus cōgnōscendus
verbal nouns gerund supine
nominative genitive dative/ablative accusative accusative ablative
cōgnōscere cōgnōscendī cōgnōscendō cōgnōscendum cōgnitum cōgnitū

1At least one rare poetic syncopated perfect form is attested.

Derived terms[edit]



  • cognosco in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • cognosco in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
  • cognosco in Gaffiot, Félix (1934) Dictionnaire Illustré Latin-Français [Illustrated Latin-French Dictionary], Hachette
  • Carl Meissner; Henry William Auden (1894) Latin Phrase-Book[1], London: Macmillan and Co.
    • to study Plato: Platonem legere et cognoscere
    • to hold an inquiry into a matter: aliquid, causam cognoscere
  • cognosco in Ramminger, Johann (accessed 16 July 2016) Neulateinische Wortliste: Ein Wörterbuch des Lateinischen von Petrarca bis 1700[2], pre-publication website, 2005-2016