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From in ‎(on, upon) + stō ‎(I stand).



īnstō ‎(present infinitive īnstāre, perfect active īnstitī, supine īnstātum); first conjugation, limited passive

  1. (transitive, intransitive) I stand upon, set foot on.
  2. (transitive, intransitive, with accusative or dative) I assail, press upon, harass.
  3. (intransitive, with dative) I urge, pursue, insist.
  4. (transitive) I urge (forward), ply.
  5. (intransitive) I am pressing, draw nigh, approach, threaten.


   Conjugation of insto (first conjugation, only third-person forms in passive)
indicative singular plural
first second third first second third
active present īnstō īnstās īnstat īnstāmus īnstātis īnstant
imperfect īnstābam īnstābās īnstābat īnstābāmus īnstābātis īnstābant
future īnstābō īnstābis īnstābit īnstābimus īnstābitis īnstābunt
perfect īnstitī īnstitistī īnstitit īnstitimus īnstitistis īnstitērunt, īnstitēre
pluperfect īnstiteram īnstiterās īnstiterat īnstiterāmus īnstiterātis īnstiterant
future perfect īnstiterō īnstiteris īnstiterit īnstiterimus īnstiteritis īnstiterint
passive present īnstātur īnstantur
imperfect īnstābātur īnstābantur
future īnstābitur īnstābuntur
perfect īnstātus + present active indicative of sum
pluperfect īnstātus + imperfect active indicative of sum
future perfect īnstātus + future active indicative of sum
subjunctive singular plural
first second third first second third
active present īnstem īnstēs īnstet īnstēmus īnstētis īnstent
imperfect īnstārem īnstārēs īnstāret īnstārēmus īnstārētis īnstārent
perfect īnstiterim īnstiterīs īnstiterit īnstiterīmus īnstiterītis īnstiterint
pluperfect īnstitissem īnstitissēs īnstitisset īnstitissēmus īnstitissētis īnstitissent
passive present īnstētur īnstentur
imperfect īnstārētur īnstārentur
perfect īnstātus + present active subjunctive of sum
pluperfect īnstātus + imperfect active subjunctive of sum
imperative singular plural
first second third first second third
active present īnstā īnstāte
future īnstātō īnstātō īnstātōte īnstantō
non-finite forms active passive
present perfect future present perfect future
infinitives īnstāre īnstitisse īnstātūrus esse īnstārī īnstātus esse īnstātum īrī
participles īnstāns īnstātūrus īnstātus īnstandus
verbal nouns gerund supine
nominative genitive dative/ablative accusative accusative ablative
īnstāre īnstandī īnstandō īnstandum īnstātum īnstātū


  • insto” in Charlton T. Lewis & Charles Short, A Latin Dictionary, Oxford: Clarendon Press, 1879.
  • instant in The Century Dictionary, The Century Co., New York, 1911




  1. First-person singular (yo) present indicative form of instar.