This is the 8873rd most frequent French word.
bêtement
"Stupidly" or "senselessly."
'Bêtement' here conveys a sense of unintentionally and carelessly performing an action.
Il a bêtement oublié ses clés sur la table.
He stupidly forgot his keys on the table.
'Bêtement' is used to describe a manner of reacting or behaving perceived as simple or naive.
Elle riait bêtement aux blagues qu'elle ne comprenait pas.
She was laughing silly at jokes she did not understand.
'Bêtement' expresses the idea of following or doing something without critical assessment.