prohibitive
adjective
[ prə(ʊ)ˈhɪbɪtɪv ]
• (of a law or rule) forbidding or restricting something.
• "prohibitive legislation"
• (of a price or charge) so high as to prevent something being done or bought.
• "the cost of converting existing power stations is likely to be prohibitive"
Similar:
excessively high,
extortionate,
excessive,
exorbitant,
sky-high,
preposterous,
outrageous,
scandalous,
out of the question,
beyond one's means,
more than one can afford,
unreasonable,
impossible,
overinflated,
steep,
criminal,
Origin:
late Middle English (in prohibitive (sense 1)): from French prohibitif, -ive or Latin prohibitivus, from prohibit- ‘kept in check’, from the verb prohibere (see prohibit).