prohibitive
adjective
uk/prəʊˈhɪbətɪv/ us/prəˈhɪbətɪv/too expensive for most people:
prohibitive costs/fees/rates Green groups have been unable to challenge instances of pollution in court because of prohibitive costs.
He'd like to use locally grown cottonseed or peanuts to create biofuel, but prices remain prohibitive.
be prohibitive for sb Rents in the area are prohibitive for many households.
preventing something from being done, or preventing others from succeeding:
She is the prohibitive favorite to win the Democratic nomination.
prohibitive laws/legislation