προοιστέον
προοιστέον, one must premise, place first
Alas! Could not find the search term προοιστέον.
Found the closest form προοῖσται. Other nearby forms can be found in the wordwheel, or perhaps try searching again without accents.
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Parsed as:
perfect middle-passive indicative 3rd singular (Luc) of προφέρω
No checked forms of προοιστέον in the morphology database.