This is the 1665th most frequent Portuguese word.
acha
"Thinks" or "finds" (from the verb "achar," depending on context).
In this context, 'acha' is used as the verb 'achar' conjugated in the third person singular in the present tense, meaning 'to think' or 'to suppose'.
Ela acha que o filme vai ser interessante.
She thinks the movie will be interesting.
Here, 'acha' is in the second person singular (formal in Brazilian Portuguese) in the present tense and means 'to think' when questioning an opinion.
Você acha que está tudo bem?
Do you think everything is okay?
In this instance, 'acha' represents the verb 'achar' in the third person singular present tense, and it is used to mean 'to find'.