τετραήμερος
τετραήμερος, of or lasting four days
Alas! Could not find the search term τετραήμερος.
Found the closest form τετραάρχης. Other nearby forms can be found in the wordwheel, or perhaps try searching again without accents.
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Parsed as:
✓ masculine nominative singular of τετράρχης
No checked forms of τετραήμερος in the morphology database.