vs
QUICK ANSWER
"Si" is a form of "si", a conjunction which is often translated as "if". "Más o menos" is a phrase which is often translated as "more or less". Learn more about the difference between "más o menos" and "si" below.
más o menos(
mahs
oh
meh
-
nohs
)A phrase is a group of words commonly used together (e.g., once upon a time).
a. more or less
La explicación me pareció más o menos clara.The explanation seemed more or less clear to me.
2. (alright)
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).
