This is the 12230th most frequent Spanish word.
jo
An exclamation used to express surprise, frustration, or emphasis, similar to "wow" or "damn" in English.
Expression of surprise or emphasis.
Jo, qué bonito día hace hoy.
Wow, what a beautiful day it is today.
Similar to how 'me' functions in Italian or certain dialectal emphatic particles.
Jo no sabía que te gustara tanto bailar.
I didn't know you liked dancing that much.
Expression of frustration or amazement.