ἀσυνέτως

From LSJ

ἢ λέγε τι σιγῆς κρεῖττον ἢ σιγὴν ἔχε → either say something better than silence or keep silence (Menander)

Source

French (Bailly abrégé)

adv.
sans intelligence.
Étymologie: ἀσύνετος.

Russian (Dvoretsky)

ἀσυνέτως: безрассудно, неразумно Plut.

Spanish

incomprensiblemente, neciamente