Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
nĕquĕo, īvi and ĭi, ĭtum, 4 (lengthened collat. form: nequinont pro nequeunt, ut solinunt, ferinunt, pro solent, et feriunt dicebant antiqui. Livius in Odysseā: partim errant, nequinont Graeciam redire, Paul. ex Fest. p. 162 Müll.
Imperf. nequibat, Sall. C. 59, 5; id. J. 56, 2.
Fut. nequibunt, Lucr. 1, 380.
Part. pres. nequiens, euntis: Spartacus nequiens prohibere, Sall. Fragm. p. 254 Gerl.; so, nequiens, App. M. 8, p. 207; Aus. Prof. 2: sustinere corpora plerique nequeuntes, Sall. H. 3, 72; so, nequeuntes, Arn. 1, 13; 7, 239), v. n. [nequeo: libenter etiam copulando verba jungebant, ut sodes pro si audes, nequire pro non quire, malle pro magis velle, Cic. Or. 45, 154; but Cic. himself always writes non queo in first pers. pres.], not to be able, to be unable, I cannot (class.).