The headword is a two-ending adjective in the masculine and feminine nominative singular; cf. epsilon 1834 (gloss) and see generally LSJ s.v.
The entry is probably generated by the use of the headword, in pronouncing an oath, at Demosthenes 19.172 (web address 1): "may I perish utterly destroyed and ruined if any monetary inducement would have led me to go on an embassy with these men". (Compare also 18.324.)
[1] The gloss is the same form as the lemma; cf. pi 213 (gloss) and see generally LSJ s.v. The headword is identically glossed by ps.-Zonaras 1575.3 (Tittmann). Adler also cites Lexicon Ambrosianum 1119 as identical.