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Alternative forms[edit]


From in- +‎ properō.



improperō (present infinitive improperāre, perfect active improperāvī, supine improperātum); first conjugation

  1. (intransitive, literally) to enter hastily upon
  2. (transferred senses):
    1. (intransitive) to reproach, outrage, or insult
    2. (transitive) to impute (something to someone), to ascribe (something blameworthy to someone)


   Conjugation of improperō (first conjugation)
indicative singular plural
first second third first second third
active present improperō improperās improperat improperāmus improperātis improperant
imperfect improperābam improperābās improperābat improperābāmus improperābātis improperābant
future improperābō improperābis improperābit improperābimus improperābitis improperābunt
perfect improperāvī improperāvistī improperāvit improperāvimus improperāvistis improperāvērunt,
pluperfect improperāveram improperāverās improperāverat improperāverāmus improperāverātis improperāverant
future perfect improperāverō improperāveris improperāverit improperāverimus improperāveritis improperāverint
passive present improperor improperāris,
improperātur improperāmur improperāminī improperantur
imperfect improperābar improperābāris,
improperābātur improperābāmur improperābāminī improperābantur
future improperābor improperāberis,
improperābitur improperābimur improperābiminī improperābuntur
perfect improperātus + present active indicative of sum
pluperfect improperātus + imperfect active indicative of sum
future perfect improperātus + future active indicative of sum
subjunctive singular plural
first second third first second third
active present improperem improperēs improperet improperēmus improperētis improperent
imperfect improperārem improperārēs improperāret improperārēmus improperārētis improperārent
perfect improperāverim improperāverīs improperāverit improperāverīmus improperāverītis improperāverint
pluperfect improperāvissem improperāvissēs improperāvisset improperāvissēmus improperāvissētis improperāvissent
passive present improperer improperēris,
improperētur improperēmur improperēminī improperentur
imperfect improperārer improperārēris,
improperārētur improperārēmur improperārēminī improperārentur
perfect improperātus + present active subjunctive of sum
pluperfect improperātus + imperfect active subjunctive of sum
imperative singular plural
first second third first second third
active present improperā improperāte
future improperātō improperātō improperātōte improperantō
passive present improperāre improperāminī
future improperātor improperātor improperantor
non-finite forms active passive
present perfect future present perfect future
infinitives improperāre improperāvisse improperātūrum esse improperārī improperātum esse improperātum īrī
participles improperāns improperātūrus improperātus improperandus
verbal nouns gerund supine
genitive dative accusative ablative accusative ablative
improperandī improperandō improperandum improperandō improperātum improperātū


  • impropero”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • impropero in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
  • imprŏpĕro in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette, page 786/3.
  • Jan Frederik Niermeyer, Mediae Latinitatis Lexicon Minus : Lexique Latin Médiéval–Français/Anglais : A Medieval Latin–French/English Dictionary, fascicle I (1976), page 516/1, “improperare”