This headword and gloss are found only in lexicography, e.g.: Hesychius kappa1640; Photius kappa430 Theodoridis, and found by Adler in Boysen's Lexicon Seguerianum.
The headword presents no real problem. It is the neuter plural of the regular aorist participle passive of teu/xw (tau 435) 'prepare', used with the compounding elements kat-en-, known from the related katentugxa/nw ('seek a meeting to present an accusation against', kappa 954, cf. kappa 953); cf. the common e)ntugxa/nw ('meet', epsilon 1495, cf. kappa 952) and its forms (epsilon 1469, epsilon 1468). This verb would take a direct object of teu/xw (although there are no other examples of this use), in addition to the dative governed by the prefixes.
The gloss, however, appears to be an aorist passive of the intransitive verb katen-tugxa/nw (apparently on the analogy of such aorist passives from eu)-, dus-, a)-tuxe/w). This appears to confirm that the ancients distinguished the two verbs teu/xw, tugxa/nw (tau 435, tau 1147) only insofar as the former meant 'prepare something to meet, to hit or to succeed in a goal' and the latter was a derivative of the aorist e)/tuxon (epsilon 3344) 'succeeded in meeting, hitting the goal'. We must conclude that, at least in legal terminology, the headword referred to things prepared to show the accused and the gloss referred to the same things when encountered in the case by the accused and the judge.