The headword is the perfect indicative active, second person plural, of the verb qa/ptw, I honor with funeral rites, inter, lay to rest; see generally LSJ s.v. The exact headword form is attested only in lexicography (see next note). It might be a mistake for the third person plural perfect passive teta/fatai, which occurs in Herodotus 6.103.3 (on triple-Olympic-winning mares) and would sound the same in Byzantine pronunciation.
[1] The gloss is the aorist indicative active, second person plural, of the headword verb. Identical glossing in other lexica; references at Photius tau183 Theodoridis.