ἀγελαστέω, to be ἀγέλαστος, not prone to laugh, grave
Alas! Could not find the search term ἀγελαστέω. Found the closest form ἀγελαστὶ. 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.