[1] The headword verb is common in epic: see Homer, Iliad 16.92; Odyssey 3.386, 8.4, 23.293, 17.372, al.; see LSJ s.v. at web address 1. For the headword itself cf. the Synagoge. For the gloss dioikw=, cf. Etymologicum Genuinum (and ps.-Zonaras 974). The gloss is a)/rxesqai in Hesychius eta53 (Thucydides 3.61.2; see also eta91).
[2] No, imperfect (as translated here): imperfect indicative active, third person singular, with contraction (from h(gemo/nee), of the verb h(gemone/w (see LSJ at web address 2). This is a less common variant of, but with the same meaning as, the headword, whose corresponding form of the imperfect would be h(gemo/neue. Though rarely, h(gemone/w is found in Plato: see Laws 631C, Timaeus 41C h(gemonou=n, Timaeus 70C h(gemonei=n.
For other misinterpretations of verbal forms in the Suda see under alphaiota 323, delta 1250, epsilon 1849, epsilon 2503, iota 160.