be going to do; to go do/makeThis is the infinitive dictionary form of a common Portuguese construction. In actual speech, ir is usually conjugated, as in vou fazer or vai fazer, to express a near or intended future: 'be going to do'. In more literal contexts, it can also mean physically going somewhere in order to do or make something. Fazer can mean both 'do' and 'make'.
PO: Ir fazer isso amanhã parece uma boa ideia.
EN: Going to do that tomorrow seems like a good idea.