The Latin idiota is borrowed from Greek ἰδιώτης idiōtēs which is from ἴδιος idios meaning "private" or "peculiar". Idiot has historically meant "retarded" so i

The Latin idiota is borrowed from Greek ἰδιώτης idiōtēs which is from ἴδιος idios meaning "private" or "peculiar". Idiot has historically meant "retarded" so if you wanted to say "ignorantly" you could have just said that, or "idiotically" is fine but don't pretend it has such wholesome roots.