preposterously

the idea that we can live on mars is preposterously optimistic.

his preposterously high expectations led to disappointment.

it's preposterously cold outside for this time of year.

the proposal was preposterously rejected without consideration.

she made a preposterously large bet on the game.

his preposterously detailed plan left everyone speechless.

the movie's plot was preposterously convoluted.

they made preposterously false claims about the product.

it was preposterously expensive for such a simple item.

his preposterously loud laugh could be heard across the room.