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"Si" is a form of "si", a conjunction which is often translated as "if". "Hola" is a form of "hola", an interjection which is often translated as "hello". Learn more about the difference between "si" and "hola" 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).
hola
An interjection is a short utterance that expresses emotion, hesitation, or protest (e.g., Wow!).
1. (general)
b. hi (colloquial)
A word or phrase that is commonly used in conversational speech (e.g., skinny, grandma).
¡Hola! ¿Qué hay de nuevo?Hi! What's new?