There is relatively little grammatical input in this section. You learn the present and imperfect tenses passive (GE pp. 226–227, #220), which are the same as the middle, the genitive absolute (GE p. 228, #222), comparative adverbs (GE pp. 229–230, #225) and the optative of φημί (GE p. 231, #227).
The concept of the passive will present no problem to Latinists. GE p. 227, #221 will be useful.
Aristophanes' comedy Akharnians tells us much about Athenian politics and the feelings of the countrymen of Attica cooped up inside the city during the Peloponnesian War. It holds out a tantalising vision of peace.
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1 κυρία ἐκκλησία See RGT p. 91, Section 8A line 25 and the map on RGT p. 92.
2 ἡ Πνὺξ αὑτηί αύτηί is the extra demonstrative form. Cf. ούτοσί.
ἐρῆμος Why no feminine ending? It's a two-termination adjective, i.e. it has no separate feminine ending. Compound adjectives (e.g. ἀ-θάνατος, εὐ-δόκιμος) mostly fall into this category, as well as a number of other adjectives. See GE pp. 230–231, #226.
5 σχοινίον A rope with vermilion dye was swept across the agora to push people towards the Pnyx (the hill on which the ecclesia was held). The Assembly itself was proclaimed by a trumpet call; any citizen arriving with vermilion dye, and therefore touched by the rope, could be fined for arriving late.