prohibitive
🇺🇸
/prəˈhɪbətɪv/
🇬🇧
/prəˈhɪbətɪv/
too expensive to buy or do
The prohibitive cost of the car made it impossible for me to buy it.
not allowed by law
The prohibitive rules stopped people from entering the area.
almost certain to win
The team was a prohibitive favorite to win the championship.