Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
dŭplāris, e, adj. [duplus], containing double (late Lat.): numerus, Macr. Somn. Scip. 1, 6; 2, 1: miles, one who receives double pay as a reward, Veg. Mil. 2, 7; also in the form DUPLARIUS, Inscr. Orell. 2003; 3476 al., v. duplicarius.