The headword is nominative plural of the feminine noun pi 2032 (in one of its several meanings: see LSJ s.v.); cf. also pi 2033.
[1] = Synagoge; Photius, Lexicon pi1082 Theodoridis -- but too elliptical a gloss without the supplement "bulges on water from waters" derived from parallel entries in Etymologicum Magnum 682.10-14 and Etymologicum Gudianum 475; cf. Hesychius pi2975.
[2] An approximation (e)kfu/sews should be a single word) of Theophylact Simocatta, Histories 4.15.9-10; on Domitianus, general and nephew of the emperor Maurice; cf. de Boor (182) and Whitby (126). Although they were nominally allied against the Persian rebel Baram (cf. beta 103 generally), during the Roman siege of Martyropolis (autumn of 590; cf. alpha 3649 note) Domitianus had to overcome duplicity on the part of Chosroes II; cf. Histories 4.15.10-13. On Domitianus see alpha 1277. On Chosroes see chi 418 note.