quĕo, īvi and ii, ĭtum, v. n. [etym. dub.; cf. Sanscr. çvay āmi, am strong or able],
to be able , I ( thou , he , etc.) can (class.; esp. freq. with a negation; Cic. does not use nequeo in the first pers. sing.; for a full account of the forms in use, v. Neue, Formenl. 2, p. 607 sqq.; cf.: possum, polleo, valeo).—With inf.: non queo reliqua scribere, Cic. Fam. 14, 1, 5: non quis, Hor. S. 2, 7, 92: non quit sentire dolorem, Lucr. 3, 647: ut quimus, Ter. And. 805: quod vos dicere non quitis, Arn. 3, 104: quod manu non queunt tangere, Plaut. Trin. 2, 2, 10: queam, Hor. S. 2, 5, 2; Plaut. Bacch. 4, 8, 5: queas, id. ib. 4, 8, 74; Hor. S. 2, 5, 10: queat, Sall. C. 58, 15: queamus, Verg. A. 10, 19: si queant, Just. 5, 4, 15: non quibam, Plaut. Trin. 3, 2, 31: quibat, id. Rud. 3, 1, 8; Vulg. Dan. 8, 7: quirem, Plaut. Merc. prol. 55: quiret, Cic. Off. 3, 15, 62; Tac. A. 1, 66: quirent, Stat. S. 5, 3, 60: nec credere quivi, Verg. A. 6, 463: quivit, Ter. And. 655; Nep. Att. 19, 2: quiit, Att. ap. Macr. S. 6, 1: quivimus, Vulg. Dan. 13, 39: quistis, Juvenc. 2, 679: quiverunt, Quadrig. ap. Gell. 15, 1: quivere, Tac. H. 3, 25: quivero, Vulg. Exod. 32, 30: quiverit, Liv. 4, 24; Tac. A. 1, 66: quierit, Lucr. 6, 855: quiveritis, Arn. 5, 161: quiverint, Hier. in Isa. 8, 24, 13: quissent, Aus. Epigr. 139: quibo, Plaut. Mil. 4, 6, 25: quibunt, Arn. 7, 218: quiens, Ap. Met. 6, 5, 2; in abl.: queunte, Cod. Just. 1, 3, 46: quire, Gell. 11, 9, 1: quisse, Lucr. 5, 1422.— Affirmatively: hoc queo dicere, Cic. Sen. 10, 32: habere quod queant dicere, id. Lael. 20, 71; id. Tusc. 5, 37, 108: queat, id. Rep. 2, 3, 6: queamus, id. de Or. 1, 58, 250: queunt, Sall. J. 44, 5; Col. 2, 2, 22. — In pass. : si non sarciri quitur, Caecil. ap. Diom. p. 380 P.: percipi queuntur, Att. ib.: suppleri queatur, Lucr. 1, 1045: subigi queantur, Plaut. Pers. 2, 2, 12: neque vi impelli, neque prece quitus sum, could not be driven , Att. ap. Diom. p. 380 P.: forma nosci non quita est, Ter. Hec. 572.—As dep. : pollicitus ita facturum, ne sic quidem quitus est, could not , was not able , Ap. Mag. p. 274, 17.