Learn Italian: A proposito, chiudiamo questa parentesi e cerchiamo uno spunto migliore. - By the way, let's close this parenthesis and look for a better idea.

In this context, a proposito is used to smoothly shift the conversation or bring up a related thought, translating well to 'by the way' or 'speaking of which.' It can also mean 'on purpose' or 'intentionally' in other contexts, but at the beginning of a sentence set off by a comma, it functions as a discourse marker for transition.

Is chiudiamo questa parentesi a common conversational expression in Italian?

Yes, chiudere una parentesi (literally 'to close a parenthesis') is a very common metaphor. It is used exactly like 'let's get back on track' or 'let's end this digression,' making it a perfect partner for discourse markers that navigate conversation topics. You will also hear aprire una parentesi when someone wants to make a quick side note.

What exactly does spunto mean in this context?

Spunto is a highly useful noun that translates to a 'cue,' 'starting point,' or 'inspiration.' In this sentence, uno spunto migliore means a better idea, angle, or starting point for whatever they are discussing.

Are chiudiamo and cerchiamo in the present tense or the imperative here?

They are doing the job of the imperative. For the noi (we) form, the present indicative and the imperative share the exact same conjugation. Here, they function as exhortations or suggestions, translating to 'let's close' and 'let's look for.'