The headword is the aorist active participle, masculine nominative singular, of the verb e)gkra/zw. It must be quoted from somewhere. Adler implicitly suggests Synesius, Letter 79 (225b), where the headword and loidorhsa/menos (not the present gloss's dia-) occur in fairly close conjunction. Another possibility, and one which does include a dative, is Josephus, Jewish War 1.622.
cf. generally epsilon 120.