Orlo is just one Italian equivalent of the English word "brink". Specifically, the word is a masculine noun in its singular form. It may be used to refer to both a figurative and a physical brink. The pronunciation will be "OR-lo" in Italian.
Brink means at the edge of a steep place such as a cliff above an abyss or the edge of and abstract place such as a disaster. It was the brink of the New Year when we discovered that we were out of champagne.