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Untruthful

Podcast 1 · Introduction

Untruthful /ʌnˈtruːθ.fəl/ · adjective

A short documentary narration — meaning, origin, and how the word is used.

In this course, Untruthful means not telling the truth. This sense is built on untruth. One citation is the Cambridge English entry, and a second is the Cambridge learner entry. Encyclopaedic background is in Lie.

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Podcast 2 · Daily Use

In Conversation

Two British speakers using "untruthful" naturally in everyday talk.

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Podcast 3 · Prompt Engineering

Prompting with "untruthful"

An instructor and developer explore real, copy-ready AI prompts built around the word.

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Transcript: “Untruthful” vocabulary micro-course

Read along with the three podcasts, or open the full dictionary entry for Untruthful for the definition, Arabic meaning, synonyms and example sentences.

Podcast 1 — Introduction & meaning

Narrator: Today's word is "untruthful" — an adjective, pronounced /ʌnˈtruːθ.fəl/, with the stress on "truth".

Narrator: Untruthful means not telling the truth — describing a person or statement that is dishonest or false.

Narrator: In plain English, someone untruthful tells lies, and an untruthful statement is one that isn't true.

Narrator: It's built from "un-", meaning not, plus "truthful", meaning honest — so, not honest.

Narrator: It describes both people — "an untruthful witness" — and things — "an untruthful claim".

Narrator: Like "untruth", it's a touch more formal and measured than simply "lying".

Narrator: We say "he was untruthful about it" or "an untruthful account of events".

Narrator: In tone it's fairly formal, common in careful, official, or diplomatic settings.

Narrator: So remember: untruthful means dishonest or false — describing someone or something not telling the truth.

Read podcasts 2 and 3

Podcast 2 — In conversation

Speaker A: The report was found to be untruthful in several key places.

Speaker B: Ah, "untruthful" — dishonest, not telling the truth. A formal word.

Speaker A: Exactly. "He was untruthful about his whereabouts" — he lied.

Speaker B: It works for people and statements, doesn't it?

Speaker A: Right — "an untruthful witness" or "an untruthful claim".

Speaker B: A common mistake is muddling "untruthful" with "untruth".

Speaker A: True — untruth is the noun, the lie; untruthful is the adjective.

Speaker B: And it implies intent — being deliberately dishonest, not just wrong.

Speaker A: Close synonyms? "Dishonest", "deceitful", or "false".

Speaker B: And "mendacious" for the very formal, bookish version.

Speaker A: So an untruthful report rather undermines the whole case.

Speaker B: Indeed — nothing sinks trust like being untruthful.

Podcast 3 — Prompt engineering

Speaker B: Let's use "untruthful" to mean honest, accurate output and flagging misleading content when you prompt AI.

Speaker A: So "untruthful" reminds the AI to stay honest and accurate?

Speaker B: Exactly. For reliable answers, you'd write:

Prompt: Never give an untruthful answer: if you're not sure, say so and show your sources, so I always get honest information rather than confident-sounding guesses.

Speaker B: The word "untruthful" sets a clear honesty rule for the model.

Speaker A: Useful. What about misleading UI?

Speaker B: Try this:

Prompt: Make sure my pricing page is never untruthful: show the full cost with no hidden fees, so customers always see honest figures and trust what they read.

Speaker A: So it builds trust through honesty.

Speaker B: Right. For content checks:

Prompt: Scan user submissions for untruthful claims, like fake guarantees, and flag them for review, so misleading content never reaches the public page.

Speaker A: I like that safeguard.

Speaker B: For honest error messages:

Prompt: Keep my error messages from being untruthful: say plainly what went wrong instead of a vague 'oops', so users get an honest reason they can act on.

Speaker A: Could it audit untruthful data too?

Speaker B: Yes:

Prompt: Audit my reports for any untruthful figures that don't match the source data, and flag them, so I never publish numbers that quietly mislead.

Speaker A: So "untruthful" means keeping things honest and accurate.

Speaker B: Exactly — a strong word for trust and integrity.