stupefactive


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stu·pe·fac·tive

 (sto͞o′pə-făk′tĭv, styo͞o′-)
adj.
Stupefacient.

stu′pe·fac′tive n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

stupefactive

(ˈstjuːpɪˌfæktɪv)
adj
another word for stupefying
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014