ἠθαῖον

Morpho works with a static database. If you like, you can compare the output of Morpheus.

Parsed as:

✓ masculine accusative singular (cp ἠθαῖος)
neuter nominative singular (cp ἠθαῖος)
neuter vocative singular (cp ἠθαῖος)
neuter accusative singular (cp ἠθαῖος) of ἠθεῖος