impossible to account for; unexplained; inexplicable: The boat has an unaccountable tendency to yaw.
exempt from being called to account; not answerable: As a subordinate, he is unaccountable for errors in policy.

Origin of unaccountable

First recorded in 1635–45; un-1 + accountable
Related formsun·ac·count·a·ble·ness, un·ac·count·a·bil·i·ty, nounun·ac·count·a·bly, adverb

Synonyms for unaccountable

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for unaccountable

Contemporary Examples of unaccountable

Historical Examples of unaccountable

  • The unaccountable change in Eudora's character perplexed and troubled her.


    Lydia Maria Child

  • It made a body feel creepy, it was so curious and unaccountable.

    Tom Sawyer Abroad

    Mark Twain (Samuel Clemens)

  • This was Evadna in a new and unaccountable mood, it seemed to him.

    Good Indian

    B. M. Bower

  • That is all I can tell you of that unaccountable being, myself.

  • He accepted it as he accepted all the unaccountable doings and manifestations of the gods.

    White Fang

    Jack London

British Dictionary definitions for unaccountable



allowing of no explanation; inexplicable
puzzling; extraordinaryan unaccountable fear of hamburgers
not accountable or answerable to
Derived Formsunaccountableness or unaccountability, noununaccountably, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for unaccountable

1640s, "inexplicable," from un- (1) "not" + accountable. Meaning "not liable to be called to account" is recorded from 1640s. Related: Unaccountably.

Online Etymology Dictionary, © 2010 Douglas Harper