Impossible to dispute or disprove; undeniable: unassailable truths. (adjective)
Not subject to attack or seizure; impregnable: an unassailable fortress. (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 "unassailable" in a sentence
"Her use of the expression unassailable patriarchy arguably may not include all male Catholics."
"Here, in unassailable privacy, they do their tricks for one another, then bask in their own applause."
"To be "unassailable" -- to exchange the soul of a Viking for that of a New Yorker, that of the quick pike for that of the lazy carp whose fat back grows moss covered in a dangerless pond -- that must never become the wish of a German."