Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
lingo, nxi (Prisc. 881), nctum, 3, v. a. [Sanscr. lih, rih, to lick; Gr. λιχ-, λείχω, λιχανός; cf. ligurio], to lick, lick up: mel mihi videor lingere, Plaut. Cas. 2, 8, 21: crepidas carbatinas, Cat. 98, 5: sulphur linctum, Plin. 35, 15, 50, § 177 (al. linctu): sal pecoribus datur lingendus, id. 31, 9, 45, § 105: canes linguebant ulcera ejus, Vulg. Luc. 16, 21: sanguinem Naboth, id. 3 Reg. 21, 19.
In mal. part., like the Gr. λειχάζειν, Mart. 12, 55, 13; 7, 67, 17.