ἔϊσος · eisos — LSJ
alike, equal, equal in height
alike, equal, Hom., only fem. sg. and pl., always in set phrases (exc. [ἵππους]..σταφύλῃ ἐπὶ νῶτον ἐΐσας equal in height, Il. 2.765):
1 equal, equally shared, of which each partakes alike
most freq. of a feast, equal, i.e. equally shared, of which each partakes alike, esp. of sacrificial feasts or of meals given to a stranger (for on other occasions the greatest men had the best portions), δαιτὸς ἐΐσης 1.468, al.
2 even, well-balanced
of ships, even or well-balanced, νηὸς ἐΐσης 15.729; νῆες ἐῗσαι Od. 5.175, al.
3 evenly balanced
of a shield, evenly balanced, ἀσπίδα πάντοσʼ ἐΐσην Il. 12.294, 13.157, 160, etc.
4 even, well-balanced
of the mind, even, well-balanced, φρένας ἔνδον ἐΐσας Od. 11.337, 14.178.