ἑπτετηρίς
ἑπτετηρίς, festival celebrated every seven years
Found ἑπτετηρὶς with different accentuation.
ἑπτετηρὶς feminine nominative singular of ἑπτετηρίς
ἑπτ-ετηρίς, ίδος, ἡ,
- festival celebrated every seven years, Arist. Ath. 54.7.