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Often taken to be a denominative verb 'to make bright, enlighten' to Proto-Italic *argu- (bright), from Proto-Indo-European *h₂érǵus (white), from *h₂erǵ-. Thus cognate with Ancient Greek ἄργυρος (árguros) and Hittite [script needed] (ḫarki-, bright, white). If so, compare English declare (literally to make clear) for the sense development.

Duchesne-Guillemin, Laroche and Melchert deny the above etymology and instead compare arguo with the semantically better-fitting Hittite [script needed] (arkuwā(i)-, state one's case, make a plea).



arguō (present infinitive arguere, perfect active arguī, supine argūtum); third conjugation

  1. I show, prove, assert, declare, make clear.
  2. I reprove, accuse, charge with.
    • Vulgate; Proverbia, 9:8
      Noli arguere derisorem ne oderit te argue sapientem et diliget te.
      Translation from American Standard Version:
      Reprove not a scoffer, lest he hate thee: Reprove a wise man, and he will love thee.
  3. I blame, censure.
  4. I denounce as false.


   Conjugation of arguo (third conjugation)
indicative singular plural
first second third first second third
active present arguō arguis arguit arguimus arguitis arguunt
imperfect arguēbam arguēbās arguēbat arguēbāmus arguēbātis arguēbant
future arguam arguēs arguet arguēmus arguētis arguent
perfect arguī arguistī arguit arguimus arguistis arguērunt, arguēre
pluperfect argueram arguerās arguerat arguerāmus arguerātis arguerant
future perfect arguerō argueris arguerit arguerimus argueritis arguerint
passive present arguor argueris, arguere arguitur arguimur arguiminī arguuntur
imperfect arguēbar arguēbāris, arguēbāre arguēbātur arguēbāmur arguēbāminī arguēbantur
future arguar arguēris, arguēre arguētur arguēmur arguēminī arguentur
perfect argūtus + present active indicative of sum
pluperfect argūtus + imperfect active indicative of sum
future perfect argūtus + future active indicative of sum
subjunctive singular plural
first second third first second third
active present arguam arguās arguat arguāmus arguātis arguant
imperfect arguerem arguerēs argueret arguerēmus arguerētis arguerent
perfect arguerim arguerīs arguerit arguerīmus arguerītis arguerint
pluperfect arguissem arguissēs arguisset arguissēmus arguissētis arguissent
passive present arguar arguāris, arguāre arguātur arguāmur arguāminī arguantur
imperfect arguerer arguerēris, arguerēre arguerētur arguerēmur arguerēminī arguerentur
perfect argūtus + present active subjunctive of sum
pluperfect argūtus + imperfect active subjunctive of sum
imperative singular plural
first second third first second third
active present argue arguite
future arguitō arguitō arguitōte arguuntō
passive present arguere arguiminī
future arguitor arguitor arguuntor
non-finite forms active passive
present perfect future present perfect future
infinitives arguere arguisse argūtūrus esse arguī argūtus esse argūtum īrī
participles arguēns argūtūrus argūtus arguendus
verbal nouns gerund supine
nominative genitive dative/ablative accusative accusative ablative
arguere arguendī arguendō arguendum argūtum argūtū

Derived termsEdit



  • arguo in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • arguo in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
  • arguo in Gaffiot, Félix (1934) Dictionnaire Illustré Latin-Français, Hachette
  • De Vaan, Michiel (2008) Etymological Dictionary of Latin and the other Italic Languages (Leiden Indo-European Etymological Dictionary Series; 7), Leiden, Boston: Brill