[1] Same glossing in other lexica. If this headword is actually quoted from somewhere (rather than simply being paradigmatic), there are instances in Xenophon, Plato, and elsewhere.
[2] Agathias, Histories 5.14 (p.306 Niebuhr), on Justinian I (Eastern Roman emperor 527-565); cf. Frendo (149). The time frame of the quotation is 559 CE. On Justinian, see iota 446.
[3] Theophylact Simocatta, Histories 3.15.9, on Tanchosdro's defeat (summer of 577) of the Romans under Justinian in Armenia; cf. de Boor (142), Whitby (96), and mu 811. On Tanchosdro, see delta 1327 note. On Justinian, Roman general in the east 575-577, see PLRE IIIa s.v. Iustinianus(3).
[4] The first person singular pluperfect would be better spelled a)peirh/kh, as at Plato, Phaedo 99D. The third person singular could be a)peirh/kei or a)peirh/kein. According to LSJ, a)pei/rhka is used "by correct writers" for the perfect of a)pagoreu/w. In the Synagoge a)peirh/kh is glossed with the words a)peirh/kein kai\ a)phgoreu/qhn: e)/sti ga\r a)pro/swpon ("a)peirh/kein [pluperfect, third person] and a)phgoreu/qhn [aorist passive, first person]: for it is impersonal"). Evidently pluperfect forms were confusing even then.
[5] Feminine nominative singular of this perfect participle, perhaps from Menander, Perikeiromene 131.
[6] Instances in Xenophon, [Demosthenes] and elsewhere.