Impossible to overcome or defeat: unconquerable obstacles to success; an unconquerable 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 "unconquerable" in a sentence
"'Then you believe more in a big army, and in what they call our unconquerable Navy, than in Almighty God?"
"From the ashes of every pyre sprang the Jewish Law in unfading youth -- that indestructible, ineradicable mentality and hope, which opponents are wont to call unconquerable Jewish defiance."
"I will not lower her by calling her unconquerable, for she has never been assailed; but I call her ever-victorious."