ludicrously
Definitions
In a manner that is so foolish, unreasonable, or out of place as to be amusing.
To an extreme or excessive degree.
Examples
The price of the designer handbag was ludicrously high for such a simple design.
He was ludicrously overdressed for a casual backyard barbecue.
Synonyms
absurdly ridiculously preposterously laughably farcically comically outrageously
Antonyms
sensibly reasonably logically rationally seriously plausibly moderately