Simple Definition of unassailable

from our Learner's Dictionary

unassailable

adjective

ˌʌnəˈseɪləbəl

formal : not able to be doubted, attacked, or questioned

an unassailable [=undeniable, indisputable] fact/truth

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“Unassailable.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/unassailable. Accessed 16 Jun. 2026.

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