This is the 79th most frequent Catalan word.
cosa
Thing.
Here, 'cosa' refers to an object or item without specifying its exact nature.
Aquesta cosa és meva.
This thing is mine.
In this example, 'cosa' represents an abstract idea or matter to be discussed.
Una cosa que vull dir és que et respecto molt.
One thing I'd like to say is that I respect you a lot.
Here, 'cosa' is used to indicate an unspecified item related to context.