Lewis & Short

ignōro, āvi, ātum, 1 (old form of

  1. I. inf. pres. pass. ignorarier, Ter. Phorm. 5, 7, 38), v. a. and n. [ignarus], not to know (a person or thing), to have no knowledge of, to be unacquainted with, to be ignorant of, to mistake, misunderstand (a person or thing—class.; cf. nescio).
    Constr. with acc., with acc. and inf., or rel. clause, with de, quin, or absol.
          1. (α) With acc.: siquidem istius regis (Anci) matrem habemus, ignoramus patrem, Cic. Rep. 2, 18: erras si id credis et me ignoras, Clinia, do not know me, mistake me, Ter. Heaut. 1, 1, 52: isti te ignorabant, id. Eun. 5, 8, 59; cf.: qui illum ignorabant, Cic. Ac. 2, 2, 4: et illum et me vehementer ignoras, id. Rab. Post. 12, 33; Just. 13, 2, 11; Liv. 26, 12: cum exercitu tirone, ignoto adhuc duci suo ignorantique ducem, id. 21, 43, 14; cf. § 18: illi iniqui jus ignorant, Plaut. Am. prol. 37: si haec ignoremus, multa nobis et magna ignoranda sint, Cic. Rep. 1, 13: istam voluptatem Epicurus ignorat? id. Fin. 2, 3, 7: quod tu quidem minime omnium ignoras, id. Or. 68, 227: ignoro causam (belli), detestor exitum, id. Phil. 8, 2, 7 fin.: Juppiter, ignoro pristina furta tua, Prop. 2, 2, 4: motus astrorum, Juv. 3, 43.
            In pass., not to be known or recognized: ignoratur parens, Ter. Phorm. 2, 3, 10: fugitive, etiam nunc credis, te ignorarier? id. ib. 5, 7, 38: sciscitantes quisnam esset, nam ignorabatur, Suet. Vit. 17: ignoratus Romanos palantes repente aggreditur, unknown, undiscovered, Sall. J. 54, 9; cf.: servili habitu per tenebras ignoratus evasit, Tac. H. 4, 36; 3, 23; 74: haec omnia ignorari possunt, Quint. 3, 5, 6; Ov. Tr. 1, 5, 18: Archimedis ignoratum a Syracusanis indagavi sepulcrum, Cic. Tusc. 5, 23, 64: Cn. Octavii eloquentia, quae fuerat ante consulatum ignorata, id. Brut. 47, 176: aut ignoratae premit artis crimine turpi, Hor. A. P. 262.
            Hence, to be changed, disguised: pallam illam ad phrygionem ut referas, ut reconcinnetur. … Men. Hercle; eādem ea ignorabitur, ne uxor cognoscat te habere, Plaut. Men. 2, 3, 74: non esse eam dices faxo: ita ignorabitur, id. ib. 3, 2, 3.
          2. (β) With acc. and inf.: quis ignorabat, Q. Pompeium fecisse foedus, eādem in causā esse Mancinum? Cic. Rep. 3, 18; Quint. prooem. § 1: neque ignoro, toto illo tempore vix tantum effici, quantum, etc., id. 1, 1, 17; 2, 4, 38; 3, 6, 78; cf.: neque illud ignoro, in iisdem fere esse et ornatum, id. 8, 6, 3.
          3. (γ) With rel. or interrog.-clause: cum id quam vere fiat ignores, Cic. Lael. 26, 97: ignorante rege, uter eorum esset Orestes, id. ib. 7, 24: ipsa vero sapientia, si se ignorabit, sapientia sit necne, etc., id. Ac. 2, 8, 24: non ignoro, quanti ejus nomen putetis, id. N. D. 3, 31, 78: non ignorans, quanta ex dissensionibus incommoda oriri consuessent, Caes. B. G. 7, 33, 1: quid optandum foret ignorasse, Juv. 10, 103.
          4. * (δ) With de: ignorat etiam de filio, Cic. Att. 8, 14, 3.
            (ε) With quin: quis ignorat quin, etc., Cic. Fl. 27, 64; Quint. 12, 7, 8; Sulp. Sev. Dial. 1, 3, 8.
            (ζ) Absol.: an vero vos soli ignoratis? vos hospites in hac urbe versamini, Cic. Mil. 12, 33; Quint. 9, 4, 119: cur ego, si nequeo ignoroque, poëta salutor? Hor. A. P. 87: ita nunc ignorans suo sibi servit patri, Plaut. Capt. prol. 50.
            (η) With inf. (very rare): laetitiae causas ignorat dicere miles, Laetaturque tamen, Claud. Nupt. Hon. 186.
  2. II. To take no notice of, pay no attention to, ignore, disregard (rare): mille modis amor ignorandust, Plaut. Trin. 2, 1, 30: quorum ego nec benevolentiam erga me ignorare, nec auctoritatem aspernare debeam, Cic. Rosc. Am. 1, 4: haec tamen ignorat quid sidus triste minetur Saturni, Juv. 6, 569.
    Hence, ignōrans, antis, P. a., not knowing, unaware, ignorant of a thing (very rare): ille, eventus belli non ignorans, Caes. B. G. 6, 42, 1.
    Adv.: ignō-ranter, ignorantly: ignoranter vel simpliciter non faciunt, quod, etc., Cypr. Ep. 63.