construction
The Italian word 'costruzione' is a noun that refers to the act or process of building or assembling something. It is used in the same context as its English counterpart, 'construction'. For example, 'La costruzione della casa richiederà diversi mesi' translates to 'The construction of the house will take several months'.
My school is under construction.
In this sentence, 'costruzione' is used to inform that the described institution, a school in this situation, is currently undergoing a building or renovating process.
The construction of the bridge will take three months.
None
I just joined a construction company.
In this case, 'costruzione' refers to the nature of a business entity: a company that builds structures as its main activity.