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un·ex·cep·tion·a·ble (ŭnĭk-sĕpshə-nə-bəl)
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adj.
Beyond any reasonable objection; irreproachable.

unex·ception·a·bly adv.

Usage Note: The adjectives unexceptionable and unexceptional are sometimes confused. Unexceptionable is derived from the word exception in its sense "objection," as in the idiom take exception. Thus unexceptionable means "not open to any objection": "By the end of the 1930's ... the prohibition against makeup had been lifted, and powder, lipstick, mascara and rouge had become unexceptionable parts of the beauty arsenal" (Liesl Schillinger). Unexceptional, in contrast, generally means "not exceptional, not varying from the usual": "His physical appearance must have been unexceptional, since few of those who knew him firsthand can recall anything about how he looked, other than the fact that he was small" (Daniel B. Silver).

The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
 

Indo-European & Semitic Roots Appendices

    Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:

    Indo-European Roots

    Semitic Roots

    The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.