vs
QUICK ANSWER
"Si" is a form of "si", a conjunction which is often translated as "if". "Inyección" is a noun which is often translated as "injection". Learn more about the difference between "si" and "inyección" below.
si(
see
)A conjunction is a word that connects words, phrases, clauses, or sentences (e.g., The cat and the dog slept.).
A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
la inyección(
een
-
yehk
-
syohn
)A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).
a. injection
La inyección de esteroides sin supervisión médica puede ser nociva para la salud.The injection of steroids without medical supervision can be harmful to your health.
2. (medicine)
a. injection
El médico me puso una inyección de penicilina y me recetó unas píldoras.The doctor gave me a penicillin injection and prescribed some pills for me.
b. shot (colloquial)
A word or phrase that is commonly used in conversational speech (e.g., skinny, grandma).
¿Crees que necesito una inyección antitetánica?Do you think I need an anti-tetanus shot?
3. (increment)
4. (mechanics)
a. injection
Tendremos que reemplazar la manguera de inyección de combustible.We'll need to replace the fuel injection hose.