μεσσωτήρ

Alas! Could not find the search term μεσσωτήρ.
Found the closest form μέσσῳ. Other nearby forms can be found in the wordwheel, or perhaps try searching again without accents.

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

Parsed as:

✓ masculine dative singular
✓ neuter dative singular of μέσος