prohibitive
[adjective]
Synonyms: exorbitant, excessive, extortionate, steep (informal)

[TahlilGaran] English Synonym Dictionary ▲

pro‧hib‧i‧tive AC /prəˈhɪbətɪv, prəˈhɪbɪtɪv $ proʊ-/ adjective
[Word Family: verb: prohibit; noun: prohibition; adjective: prohibitive]

1. prohibitive costs are so high that they prevent people from buying or doing something:
The cost of land in Tokyo is prohibitive.

2. a prohibitive rule prevents people from doing things:
prohibitive regulations
—prohibitively adverb:
Moving house would be prohibitively expensive.

[TahlilGaran] Dictionary of Contemporary English ▲