ἑπταέτης
From LSJ
πλέων επί οίνοπα πόντον επ' αλλοθρόους ανθρώπους → while sailing over the wine-dark sea to men of strange speech
English (LSJ)
ες, of seven years; neut. ἑπτάετες, as Adv., for seven years, Od. 3.304, 7.259.
English (Autenrieth)
(ϝέτος): only neut., ἑπτάετες, seven years. (Od.)
Middle Liddell
ἑπταέτης, ες
of seven years: neut. ἑπτάετες as adv. for seven years, Od.