vs 

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"Ni siquiera" is a phrase which is often translated as "not even", and "cinturón de seguridad" is a noun which is often translated as "safety belt". Learn more about the difference between "ni siquiera" and "cinturón de seguridad" below.
ni siquiera(
nee
 
see
-
kyeh
-
rah
)
A phrase is a group of words commonly used together (e.g., once upon a time).
phrase
a. not even
¡Ya basta! Ni siquiera sabes lo que estás diciendo. Enough already! You don't even know what you're saying.
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el cinturón de seguridad(
seen
-
too
-
rohn
 
deh
 
seh
-
goo
-
ree
-
dahd
)
A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
masculine noun
a. safety belt
Vamos a despegar. Por favor, abróchense los cinturones de seguridad.We are about to take off. Please, fasten your safety belts.
b. seat belt
Debe llevar puesto su cinturón de seguridad en todo momento en el interior del vehículo.You must wear your seat belt at all times inside the vehicle.
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