through
The Italian word 'attraverso' is used similar to the English word 'through'. It denotes moving in one side and out of the other side. It could also mean 'by means of', showing the way something happens or is achieved. For instance, the phrase, 'I learned Italian through a language course', would be 'Ho imparato l'italiano attraverso un corso di lingua' in Italian.
I go to city through the park
This example is showing how to use 'attraverso' when it is indicating a path which is being traveled in order to reach a destination. In this case, the speaker indicates that they are going to the city by passing through the park.
I learned Italian through an online course
This phrase demonstrates the usage of 'attraverso' when it's referring to a mean or method via which a certain action has been performed. Here, the person learned Italian by means of, or through, an online course.
You can see the garden through the window
In this sentence, 'attraverso' is used to indicate the medium that provides a view or perspective of something else. Here, the window acts as the medium through which the garden can be seen.