[1] The headword, clearly taken from the cited text, is the accusative plural of the rare masculine noun sunde/ths, a person bound hand and foot; see LSJ s.v. The gloss is the perfect passive participle, masculine accusative plural, of the cognate compound verb sunde/w.
[2] Two lines of iambic trimeter by an unidentifiable author. Adler notes that Toup (1790) II 217-18 assigned them to George of Pisidia.