serving or tending to prohibit or forbid something.
sufficing to prevent the use, purchase, etc., of something: prohibitive prices.
Origin of prohibitive
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
less commonly prohibitory (prəˈhɪbɪtərɪ, -trɪ)
prohibiting or tending to prohibit
(esp of prices) tending or designed to discourage sale or purchase
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Online Etymology Dictionary, © 2010 Douglas Harper