προστέγιον

Alas! Could not find the search term προστέγιον.
Found the closest form προστέθεικας. 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:

✓ perfect active indicative 2nd singular (morph21) of προστίθημι