unaccounted-for

[ uhn-uh-koun-tid-fawr ]
/ ˌʌn əˈkaʊn tɪdˌfɔr /

adjective

not accounted for; not understood; unexplained: an explosion resulting from some unaccounted-for mechanical failure.

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. 2019

Examples from the Web for unaccounted-for

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

    The Grey Woman and other Tales|Mrs. (Elizabeth) Gaskell
  • The expenses necessitated by these frequent removals make an unaccounted-for item in many incomes.

    The Cost of Shelter|Ellen H. Richards
  • My intention, of course, was to call to the notice of the jurors its unaccounted-for disappearance.

    A Master Hand|Richard Dallas