Questions & Answers about Ele não confia no vizinho.
Why is there a no before vizinho? In English we just say "trust the neighbour".
The verb confiar (to trust) always requires the preposition em (in). You cannot just trust someone in Portuguese; you have to trust in them. Here, em combines with the masculine word for "the" (o) to make the contraction no (em + o).
What would the sentence look like if the neighbour were a woman?
Why doesn't this sentence translate the "does" from "does not trust"?
Can confiar be used for trusting things as well as people?
Yes, you can use it for both! For example, Eu confio no plano means "I trust the plan", using the exact same rule requiring the preposition em.