contain
The Italian word 'contenere' is used to express the concept of holding, keeping, or containing something within a certain space or boundary. It can also be used metaphorically to express the idea of restraining or controlling emotions or actions. For example, 'Il vaso riesce a contenere molte piante' (The vase can contain many plants) or 'Non riesco a contenere la mia rabbia' (I can't contain my anger).
This package should contain four items.
This sentence is an example of using 'contenere' to mean 'to contain' in the context of a package having four items in it.
Your suitcase can not contain liquids.
In this instance, 'contenere' is used to specify what an object (the suitcase) should not have (liquids). It indicates prohibition.
The bag should contain organic waste only.
Here, 'contenere' is used to indicate what should be inside a specific container, in this case a bag, prescribing that it should exclusively contain organic waste.