Usages of avisar
Um anúncio no aeroporto avisou que poderia haver atraso na bagagem.
An announcement at the airport warned that there could be a delay with the luggage.
Avisa o vizinho antes de chover.
Warn the neighbour before it rains.
Quando estou de mau humor, aviso os meus amigos para não discutirmos por nada.
When I am in a bad mood, I warn my friends so that we don’t argue over nothing.
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