Same or similar entry in other lexica: see the references at Photius kappa413, where Theodoridis obelizes the transmitted headword kateda/rqh -- i.e. aorist passive, third person singular, of katadarqa/nw -- and supports Wyttenbach's emendation to kate/darqe. For this cf. a scholion on Plato, Apology 40D (where kate/darqen occurs: web address 1).
The Attic aorist is kate/darqon; in epic, kate/draqon occurs (with a different treatment of original vocalic r); see kappa 926. The aorist passive form is found in later writers (LSJ s.v.).
For this verb, see also kappa 518.