Standard Lemma guide

untrust

adj · noun · verb · 5 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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  • rhymes with -ʌst

1

adj

Meaning 1

Faithless; distrustful.

Definition source: English Wiktionary via Wiktextract

Usage: archaic

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

Lack or absence of trust; mistrust.

Definition source: English Wiktionary via Wiktextract

Usage: uncountable, usually

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

The zone representing everything that originates outside of the firewall.

Definition source: English Wiktionary via Wiktextract

Usage: uncountable, usually

Topics: engineering, natural-sciences, physical-sciences, technology

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

verb

Meaning 4

To fail to trust; to distrust.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

verb

Meaning 5

To mark or flag (something) as untrustworthy.

Definition source: English Wiktionary via Wiktextract

Topics: engineering, natural-sciences, physical-sciences, technology

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

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

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