Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
dē-contor (cunctor), āri, v. dep. n., to hesitate, to be at a loss (perhaps only in Appuleius): unde potissimum caperet exordium, decontatur, App. M. 10, p. 239; id. ib. 7, p. 198.