A.strength, force, of persons, “ἀλλ᾽ ἄρα καὶ ἲς ἐσθλή” Il.12.320; “ἐπέρεισε δὲ ἶν᾽ ἀπέλεθρον” 7.269; “ἤ μοι ἔτ᾽ ἐστὶν ἴς, οἵη πάρος . . ” Od.21.283, cf. 11.393, 18.3: freq. in periphr., ἱερὴ ἲς Τηλεμάχοιο the strong Telemachus, 2.409; “κρατερὴ ἲς Ὀδυσῆος” Il.23.720; “ἲς Ἡρακλῆος” Hes.Th.951; and in twofold periphr., ἲς βίης Ἡρακληείης ib.332; also of things, ἲς ἀνέμου or ἀνέμοιο, Il.15.383, 17.739, Od.9.71; “ἲς ποταμοῖο” Il.21.356; κράται᾽ ἴς was read by Ptol.Asc.in Od.11.597; v. κρατύς. (ϝι_-, cf. γίς: ἰσχύς, Hsch., pr. n. “ϝιφιάδας” IG7.3172.70, Lat. vis, vim; prob. cogn. with ἵεμαι but not with ἴς (A).)
ἴς (B) [ι_], ἡ, three times in acc. sg. ἶνα (elided ἶν᾽) Il.5.245,7.269, Od.9.538, freq. in instr. ἶφι (q.v.), elsewh. only nom. sg.:—