Incapable of being shaken: unshakable faith. (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 "unshakable" in a sentence
"In a statement afterward, the president spoke directly to U.S. troops in Iraq, pledging what he called his unshakable commitment to securing peace and adding the stakes are simply too high to just give up."
"The normally dogged governor canceled his State of the State address Tuesday and took to the Assembly floor, choking up in an emotional eulogy for Mr. DeCroce, whom he called his "unshakable ally.""
"The country remains gripped in unshakable economic doldrums."