preposterously
adverb /prɪˈpɒstərəsli/
/prɪˈpɑːstərəsli/
(formal)- in a way that is completely unreasonable, especially when it shocks or annoys you synonym outrageously
- a preposterously expensive bottle of wine
- in a way that is greater than what seems reasonable or appropriate
- She was relatively poor and he was preposterously rich.