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unaccounted-for

[uhn-uh-koun-tid-fawr]
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adjective
  1. not accounted for; not understood; unexplained: an explosion resulting from some unaccounted-for mechanical failure.
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Origin of unaccounted-for

1790–1800; formed on the verb phrase account for; see un-1, -ed2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for unaccounted-for

Historical Examples

  • This last is hardly a story of unaccounted-for disappearance.

    The Grey Woman and other Tales

    Mrs. (Elizabeth) Gaskell

  • My intention, of course, was to call to the notice of the jurors its unaccounted-for disappearance.

    A Master Hand

    Richard Dallas

  • The expenses necessitated by these frequent removals make an unaccounted-for item in many incomes.

    The Cost of Shelter

    Ellen H. Richards

  • The result of this stock-taking shows that eleven volumes were unaccounted-for, a list of which is appended.

    Report of the Chief Librarian for the Year 1924-25

    General Assembly Library (New Zealand)