Not justifiable; inexcusable: unwarrantable criticism. (adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "unwarrantable" in a sentence
"You demand an explanation of what you have termed my unwarrantable action in taking possession of your august person."
""If you look at other mines that are the same size or bigger, they do not have the sheer number of 'unwarrantable' citations that this mine has.""
"The inconveniences under which that trade now labored were manifest, but he could not think, with the petitioners, that these inconveniences arose from "the nature of the duties" so much as "through the medium of the dissatisfaction of the Americans, and those combinations and associations of which we have heard" -- associations and combinations which had been called, in an address to the House, "unwarrantable," but which he for his part would go so far as to call illegal."