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Etymology 1Edit

From Middle English untrust, untrost, untrist, probably a modified form of Old Norse útraust (untrust), equivalent to un- +‎ trust. Cognate with Icelandic útraust (untrust), Swedish otro (lack of faith, disbelief).


untrust (uncountable)

  1. Lack or absence of trust; mistrust; distrust.
    • 2006, Matthias Klusch, Michael Rovatsos, Terry R. Payne, Cooperative Information Agents X:
      Alternatively, untrust corresponds to the space between distrust and trust, in which an agent is positively trusted, but not sufficiently to cooperate with.
    • 2009, Kai Rannenberg, Denis Royer, André Deuker, The Future of Identity in the Information Society:
      The absence of trust is sometimes called untrust (Marsh and Dibben, 2005). As most of the trust literature focuses on the positive aspect of trust, it is restricted to the simple dichotomy between trust and untrust.
  2. (technology) An external port.



Etymology 2Edit

From Middle English untrust, untriste, probably from Old Norse útraustr (untrustworthy). Cognate with Icelandic útraustur.


untrust (comparative more untrust, superlative most untrust)

  1. (archaic) Faithless; distrustful.

Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
(See the entry for untrust in
Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.)