This is the 34th most frequent Portuguese word.
isso
"Isso" means "that" (referring to something near the listener or previously mentioned).
'Isso' refers to a specific statement or piece of information previously mentioned.
Por que você disse isso para ela?
Why did you say that to her?
'Isso' plays the role of pointing to the entire preceding clause, summarizing or encapsulating it.
Se você está certo, isso significa que estamos errados.
If you are correct, that means we are wrong.
'Isso' functions as a demonstrative pronoun referring to something previously mentioned or implied.