The term "liar" translates to "mentiroso" in Spanish and is most commonly used as a noun.
/men.tiˈɾo.so/
The word "mentiroso" refers to a person who tells lies or falsehoods. It is used in general contexts to describe someone known for deceit or dishonesty.
"Mentiroso" is a commonly used term in both spoken and written Spanish, though you may encounter it more frequently in conversations, where honesty or dishonesty is being discussed.
He is a liar; he never tells the truth.
No confío en ella porque es muy mentirosa.
I don’t trust her because she is very deceitful.
La gente a menudo llama mentiroso a quien no le cree.
The word "mentiroso" is part of various idiomatic expressions in Spanish, emphasizing themes of truth, trust, and dishonesty.
This expression implies that the liar is extremely deceitful.
"Hacer de mentiroso" (To act like a liar)
There’s no need to act like a liar to get what you want.
"No se puede ocultar la verdad aunque seas muy mentiroso." (You cannot hide the truth even if you are very deceptive)
Sometimes the truth always comes to light, no matter how much of a liar you are.
"Mentiroso, mentiroso, pantalones en fuego" (Liar, liar, pants on fire)
The word "mentiroso" originates from the verb "mentir," which means "to lie." The verb itself comes from the Latin verb "mentīre," which stems from the root that relates to deception.