Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
sōlers, sōlerter, and sōlertĭa, v. sollers, etc.
sollertĭa (sōlert-), ae, f. [sollers], skill, shrewdness, quickness of mind, ingenuity, dexterity, adroitness, expertness, etc. (class.; syn.: acumen, subtilitas, scientia): data est quibusdam bestiis machinatio quaedam atque sollertia, Cic. N. D. 2, 48, 123: nulla ars imitari sollertiam naturae potest, id. ib. 1, 33, 92: Chaldaei sollertiā ingeniorum antecellunt, id. Div. 1, 41, 91; cf.: est genus (Gallorum) summae sollertiae, Caes. B. G. 7, 22: hominum adhibita sollertia, id. B. C. 2, 8 fin.: ingenii sollertia, shrewdness, Sall. J. 7, 7: in hac re tanta inest ratio atque sollertia, knowledge and skill, Cic. Rep. 1, 16, 25; so (with ratio) Tac. G. 30: ut artis pariat sollertia, Claud. Rapt. Pros. 3, 33: in omni re fugienda est talis sollertia, such subtlety, Cic. Off. 1, 10, 33: mirari non modo diligentiam sed enim sollertiam ejus, id. Sen. 17, 59: quae tua formosos cepit sollertia? Tib. 1, 4, 3: omnia conando docilis sollertia vicit, Manil. 1, 95; Luc. 8, 283: placuit sollertia tempore etiam adjuta, the ingenious plan, Tac. A. 14, 4.
Plur.: egregiis ingeniorum sollertiis ex aevo collocatis, Vitr. 7 praef. med.