Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
dis-quīro, ĕre, v. a. [quaero], to inquire diligently, to investigate, Hor. S. 2, 2, 7; Claud. Laud. Stil. 1, 239; Lamprid. Alex. Sev. 16, 2; Vulg. 2 Macc. 2, 31.