[1] The headword is an adverb derived from the stem of the verb e)nalla/ssw ('change', 'alternate'), while the gloss is an adverb based on the perfect participle, middle/passive, of the verb sumple/kw; see epsilon 1106. For this adverb see, besides Agathias (quoted below), Greek Anthology 5.302.16, Manetho 4.181, Dorotheus (in Hephaestion Apotelesmatica 1.288 Pingree).
[2] Agathias, Histories 1.12. In this episode during the Gothic War (535-554), the Byzantine general Narses (cf. nu 42 generally) stages a mock execution of Lucchesi hostages in 553 CE before the citizens of Luca (present-day Lucca, in Tuscany, Italy); cf. Frendo (19-20). For additional background, see alpha 457, alpha 1709, epsilon 917, and mu 707. For scholarly doubts about the authenticity of Agathias's account see alpha 457 note.