Same entry in other lexica, and various scholia; see the references at Photius kappa415 Theodoridis. The headword is the aorist indicative active, third person singular, of katadarqa/nw (cf. kappa 917). It must be quoted from somewhere (though it is only extant, outside lexicography, in Michael Attaliates 164.2 and Zonaras, Epitome historiarum 71.11).