untrust

• Rhymes: -ʌst

From Middle English untrust, untrost, untrist, likely from un- +‎ trust. Cognate with Icelandic útraust (“untrust”). Compare also Swedish otro (“lack of faith, disbelief”).

untrust (usually uncountable, plural untrusts)

1. Lack or absence of trust; mistrust.
   • 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.

   • 2013, Osho International Foundation, I Say Unto You: Jesus: Son of God or Mystic?:

     I would like to remind you that it is untrust not distrust, that it is fear and, in a way, natural.

   • 2023, Derward Rollison, The Ups and Downs in Life:

     I almost have a feeling of trust, and then have an untrust feeling; she is only happy when I pay something for her.

2. (technology) The zone representing everything that originates outside of the firewall.
   • 2011, Walter J. Goralski, Cathy Gadecki, Michael Bushong, JUNOS OS For Dummies, page 219:

     You have only two zones (admins and untrust), so there are two intra-zone policy contexts (admins to admins and untrust to untrust ) and two inter-zone policy contexts ( admins to untrust and untrust to admins ) .

   • 2011, Thomas W Shinder, The Best Damn Firewall Book Period, page 974:

     The untrust zone is designed typically for the Internet or other undesirable places.

   • 2013, Brad Woodberg, Rob Cameron, Juniper SRX Series, page 872:

     In this example, we enable AppTrack in the trust and untrust zone, along with a syslog server to send the logs to our STRM at 192.168.1.20.

Many authors make a distinction between untrust and distrust. When such a distinction is made, untrust is a lack of trust, while distrust is a belief in the malevolence of another. Thus, it is untrust when you doubt your ability to accomplish something, but distrust if you believe that someone is actively preventing you from accomplishing something.

• distrust
• mistrust
• wantrust (obsolete)

• trust

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.

untrust (third-person singular simple present untrusts, present participle untrusting, simple past and past participle untrusted)

1. To fail to trust; to distrust.
   • 1656, Obadiah Sedgwick, The Humbled Sinner Resolved what He Should Do to be Saved, page 228:

     As to pray and not to trust, so to trust and not to expect, to trust and then to murmur, to trust and to untrust, whiles we are speaking, to get the soul to put it selfe upon Christ , and before we have done speaking, to pluck of the soul againe, to deface our own fealing, to cast away our confidence, this is ill, very ill .

   • 1874, John Howie, The Scots Worthies, page 277:

     upon the verity thereof I am content to die, and ready to lay down my life; and hope your charity to me a dying man, will be such as not to untrust me therein; especially since it is notoriously adminiculate by act of secret Council , and yet denied upon oath by the principal officers of state present in Council at the making of said act, and whom the act bears to have been present;

   • 1897, William Louis Bass, The Force of Circumstances, page 10:

     Material or labor trusted in one State would have to untrust itself at crossing into the next .

2. (technology) To mark or flag (something) as untrustworthy.
   • 2010, Bill Jelen, Rev Up to Excel 2010: Upgraders Guide to Excel 2010, page 27:

     To untrust one document, you have to untrust them all.·

   • 2019, Herong Yang, PKI Tutorials - Herong's Tutorial Examples, page 152:

     […] to untrust (if delete is not possible) a certificate from macOS using Keychain Access.

   • 2022, Emilien Bourdy, Marwane Ayaida, Hace\ne Fouchal, “Misbehavior Verification on Cooperative Intelligent Transpor System”, in Frank Phillipson, Gerald Eichler, Christian Erfurth, editor, Innovations for Community Services, page 193:

     Indeed, when a node catches a malicious one, it will try to untrust it, and so the others who did not identify the malicious nodes as wicked will be more and more suspicious.