Spanish vocabulary · Beginner
Liar in Spanish: Mentiroso
Mentiroso · noun · mehn-tee-ROH-soh
Mentiroso is the Spanish word for liar, describing a person who habitually tells lies or falsehoods.
mehn-tee-ROH-soh
No le creas nada, es un mentiroso.
Don't believe anything he says, he's a liar.
Liar in Spanish: Quick Reference
Below are the most common Spanish words for liar, with pronunciation and regional usage notes.
| Spanish | English | Pronunciation | Region / Register |
|---|---|---|---|
| mentiroso | liar | mehn-tee-ROH-soh | Default, widely understood |
| mentirosa | liar | feminine form | |
| embustero | liar | literary or emphatic |
How Native Speakers Use Mentiroso
Real example sentences across three contexts you'll actually run into.
Accusation
¡Eres un mentiroso! Eso nunca pasó.
You're a liar! That never happened.
Confronting someone about a lie.
Character judgment
No confío en él porque es muy mentiroso.
I don't trust him because he's a big liar.
Explaining why you distrust someone.
Children's story
El cuento del pastor mentiroso enseña sobre la honestidad.
The story of the lying shepherd teaches about honesty.
Referencing a moral tale.
Avoid These Mistakes When Using Mentiroso
Using mentiroso as a verb
Incorrect: Él mentiroso mucho.
Correct: Él miente mucho.
Mentiroso is a noun or adjective meaning liar — the verb to lie is mentir, conjugated as miente in the third person.
Not matching gender
Incorrect: Ella es un mentiroso.
Correct: Ella es una mentirosa.
Mentiroso changes to mentirosa for feminine subjects, following standard Spanish adjective agreement.
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Why word lists alone don't stick
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See Mentiroso used by native speakers
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Common Questions About Liar in Spanish
- How do you say 'liar' in Spanish?
- The word is mentiroso for males and mentirosa for females — both derive from the verb mentir (to lie) and can function as either a noun or an adjective.
- Is mentiroso a strong insult?
- Calling someone a mentiroso is a direct accusation that can be quite offensive, especially in formal or professional settings — it is comparable in weight to calling someone a liar in English.
- What is the verb 'to lie' in Spanish?
- The verb is mentir, which is an e-to-ie stem-changing verb — it conjugates as yo miento, tú mientes, él miente, nosotros mentimos, ellos mienten in the present tense.