vs 

QUICK ANSWER
"Si" is a form of "si", a conjunction which is often translated as "if". "Tener sed" is an intransitive verb phrase which is often translated as "to be thirsty". Learn more about the difference between "si" and "tener sed" below.
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.
tener sed(
teh
-
nehr
 
sehd
)
An intransitive verb phrase is a phrase that combines a verb with a preposition or other particle and does not require a direct object (e.g., Everybody please stand up.).
intransitive verb phrase
a. to be thirsty
¿Me darías un vaso de agua? Tengo mucha sed.Would you give me a glass of water? I'm really thirsty.
Copyright © 2025 Dictionary Media Group, Inc.