Quick answer
"Diestro" is an adjective which is often translated as "right", and "siniestro" is an adjective which is often translated as "sinister". Learn more about the difference between "diestro" and "siniestro" below.
diestro(
dyehs
-
troh
)
An adjective is a word that describes a noun (e.g. the big dog).
1. (right-hand)
a. right
Por favor, levante su mano diestra para hacer el juramento.Please raise your right hand to take the oath.
2. (having a dominant right hand)
a. right-handed
Mi hermano es zurdo, pero yo soy diestra.My brother is left-handed, but I'm right-handed.
b. righty
A word or phrase that is commonly used in conversational speech (e.g. skinny, grandma).
(colloquial)
(noun)
¿Eres diestro o zurdo?Are you a righty or a lefty?
3. (adroit)
a. skillful
Regionalism used in the United States
(United States)
Eduardo es un carpintero muy diestro y competente.Eduardo is a very skillful and competent carpenter.
b. skilful (United Kingdom)
Martha se ha vuelto diestra en el uso de la tecnología.Martha has become skilful in the use of technology.
A masculine noun is used with masculine articles and adjectives (e.g. el hombre guapo, el sol amarillo).
4. (bullfighting)
a. matador
El diestro salió al ruedo dispuesto a enfrentarse con el toro.The matador came out to the bullring ready to confront the bull.
This means that the noun can be masculine or feminine, depending on the gender of person it refers to (e.g. el doctor, la doctora).
5. (person with a dominant right hand)
a. right-handed person
El detective dijo que el sospechoso es un diestro.The detective said the suspect is a right-handed person.
b. right-hander
El lanzador que acaban de contratar es un diestro.The pitcher they just hired is a right-hander.
c. righty
A word or phrase that is commonly used in conversational speech (e.g. skinny, grandma).
(colloquial)
Quiero todos los diestros de este lado y los zurdos del otro.I want all the righties on this side and the lefties on the other.
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siniestro(
see
-
nyehs
-
troh
)
An adjective is a word that describes a noun (e.g. the big dog).
1. (wicked)
a. sinister
Ese hombre me asusta; tiene una apariencia siniestra.That man frightens me; he has a sinister look.
El ladrón me echó una sonrisa siniestra y se echó a correr.The thief gave me a sinister smile and ran off.
b. evil
La policía descubrió los siniestros planes de los terroristas.The police uncovered the terrorists' evil plans.
2. (disastrous)
a. fateful
Quisiera olvidarme del día siniestro en que ninguna universidad a la que solicité me aceptó.I'd like to forget the fateful day on which I got rejected from every school I applied to.
3.
A word or phrase restricted in usage to literature or established writing (e.g. sex, once upon a time).
(literary)
(sinistral)
a. left
Su hijo se sentó a su mano diestra, y su hija a su siniestra.His son sat at his right side, and his daughter at his left.
A masculine noun is used with masculine articles and adjectives (e.g. el hombre guapo, el sol amarillo).
4. (calamity)
a. disaster
Después que pasó el huracán, el gobierno evaluó la magnitud del siniestro.After the hurricane passed, the government assessed the magnitude of the disaster.
b. catastrophe
La Cruz Roja está ayudando a las víctimas del siniestro.The Red Cross is helping the victims of the catastrophe.
5. (collision)
a. accident
Los socorristas finalemente llegaron al lugar del siniestro del avión.The emergency workers finally arrived at the site of the airplane accident.
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