Synonyms for silly

modified

silly implies ridiculous or irrational behavior that demonstrates a lack of common sense, good judgment, or sobriety it was silly of you to dress so lightly; stupid implies a slow-wittedness or lack of normal intelligence he is stupid to believe that; fatuous suggests stupidity, inanity, or obtuseness coupled with a smug complacency a fatuous smile; asinine implies the extreme stupidity conventionally attributed to an ass an asinine argument See also syn. study at absurd.