Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
pelvis, is (acc. pelvim; v. in the foll., and cf. Prisc. p. 757 P.; abl. pelvi and pelve), f. [Sanscr. pālavi; Gr. πελλίς, a bowl]. a basin, laver; acc. pelvim, Laber. ap. Non. 543, 27; Caecil. ib. 28: patulas effundere pelves, Juv. 3, 271: tot pelves pulsari, id. 6, 441; abl. pelvi, Plin. 31, 3, 27, § 46; 28, 8, 27, § 104: unguentum in argenteā pelve, Petr. 70; Plin. 30, 2, 5, § 14; Vulg. Johan. 13, 5.