Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
tractim, adv. [tractus], by drawing along, i. e. little by little, by degress; in a drawling way, at length, slowly (poet. and in post-Aug. prose), Enn. ap. Macr. S. 6, 4 (Ann. v. 418 Vahl.): quid, si ego illum tractim tangam, ut dormiat? i. e. should stroke him, Plaut. Am. 1, 1, 157: ire, Lucr. 3, 530; 6, 118: susurrant, Verg. G. 4, 260; so, sonat jucundo hiatu, Gell. 7, 20, 3: tractim pronuntiata littera i, i. e. pronounced long, id. 4, 6, 6; cf. also, dicere (opp. festinanter), slowly, Sen. Ep. 40, 9.