bring
In Italian, 'portare' is used to mean 'bring'. It is usually followed by an object, such as 'portare il libro' for 'bring the book'. Note that 'portare' changes based on who's doing the action. For instance, 'io porto' means 'I bring', 'tu porti' means 'you bring', and so on.
I have to take my son to school
The verb 'portare' is used in context of taking someone to someplace. In this example, 'portare' functions as 'to take' to express the action of bringing someone (mio figlio) to a certain location (a scuola).
Can you bring an umbrella?
This sentence/request uses 'portare' meaning 'to bring', asking if the person can bring an umbrella. It demonstrates the usage of 'portare' in the context of carrying an object from one location to another.
I want to take these books to the library
In this case, 'portare' is used to express the intent of moving objects (in this case, books) from one place (where the speaker currently is) to another (the library). This is another common use of the verb 'portare'.