καλλίσταχυς

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

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Parsed as:

feminine nominative dual superlative
feminine vocative dual superlative
feminine accusative dual superlative
✓ feminine nominative singular superlative
✓ feminine vocative singular superlative of καλός