vs 

QUICK ANSWER
"Si" is a form of "si", a conjunction which is often translated as "if". "Muchas gracias" is a phrase which is often translated as "thank you very much". Learn more about the difference between "muchas gracias" and "si" below.
muchas gracias(
moo
-
chahs
 
grah
-
syahs
)
A phrase is a group of words commonly used together (e.g., once upon a time).
phrase
a. thank you very much
¡Muchas gracias por la manzana!Thank you very much for the apple!
b. thanks a lot
Muchas gracias por llevarme al aeropuerto.Thanks a lot for taking me to the airport.
Copyright © 2025 Dictionary Media Group, Inc.
si(
see
)
A conjunction is a word that connects words, phrases, clauses, or sentences (e.g., The cat and the dog slept.).
conjunction
a. if
Si llueve mañana, cancelaremos el pícnic.If it rains tomorrow, we will cancel the picnic.
a. whether
Preguntó si me estaba divirtiendo.He asked whether I was enjoying myself.
b. if
Paco quiere saber si Laura también va a asistir.Paco wants to know if Laura is also going to attend.
A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
masculine noun
a. B
Primero lo oí en si menor.I first heard it played in B minor.
b. ti (solfége)
Practiquemos las escalas en orden inverso: do, si, la...Let's practice scales in reverse order: do, ti, la...
Copyright © 2025 Dictionary Media Group, Inc.