This is the 2383rd most frequent Portuguese word.
xi
"Xi" is an interjection expressing surprise, dismay, or concern, similar to "oops" or "uh-oh" in English.
Expressing surprise or concern upon realizing that an item has been forgotten.
Xi! Esqueci minha carteira em casa.
Wow! I forgot my wallet at home.
Anticipating an undesirable event, in this case, a change in weather that could affect plans.
Xi, parece que vai chover mais tarde.
Oh no, it seems like it will rain later.
Exclaiming in reaction to observing disorder or untidiness in a space.