ἀμφίπολις,
poetry ἀμφίπτολις, ὁ, ἡ, encompassing city, ἀνάγκη ἀμφίπτολις[[ 4th-5th c.BC: Aeschylus Tragicus “Choephori” 75 (Lyric poetry). ] Refs 4th c.BC+]
__II substantive ἀ., ἡ, city encompassed by a river, as proper name, [[ 5th c.BC: Thucydides Historicus 4.102, etc.] Refs 5th c.BC+]