In English we use the verbs “to be” and “to get” to mean so many things. "To be" is usually translated into Italian with essere, while "to get" is translated with prendere (to take), diventare (to become), or ricevere (to receive) to name a few. In certain contexts, however, the translation of "to be" or "to get" is the verb rimanere, which usually translates as "to remain" or "to stay," as in the following example.
Come vedi, appaio a rallentatore. Ma il mio tono di voce rimane lo stesso.
As you can see, I appear in slow motion. But the tone of my voice remains the same.
Captions 30-31, Yabla-Intro - IrenePlay Caption
In the example below, we have the past participle of the verb colpire (to hit, to strike, to impress) functioning like an adjective. In this case, English uses the passive form, “to be impressed,” but in Italian the act of being impressed or struck needs a more active verb. In English, to obtain a more active feeling, we might use “to get” or “to become.” Italian uses rimanere, and in this fable, it's in the passato remoto (remote past tense).
Il re rimase colpito.
The king was impressed.Play Caption
To get a better feeling of the verb rimanere, we could construe the translation like this:
The king was left dumbfounded.
In the following example, two co-workers are discussing how to get a raise.
Nel frattempo gli porti tutti i risultati che lui voleva per il mese successivo, così lui rimane impressionato, e magari...
In the meantime you show him all the results he wanted to see for the next month, that way he'll be impressed, and maybe...
Captions 47-49, Marika spiega - Pettegolezzi in ufficio con AnnaPlay Caption
In the following example, we again have the passive. The English uses the verb “to get,” but in Italian we need rimanere.
Siccome ai quei tempi nel fare l'elettricista ci si moriva, si rimaneva fulminati e io amo molto la vita.
Since in those days in working as an electrician you could die from it, you could get electrocuted, and I love life a lot.
Captions 13-14, That's Italy - Episode 1 - Part 4Play Caption
It’s important to understand and recognize this use of rimanere, but actually using it comes with time and practice.
Here are a few more past participles as adjectives that often go hand in hand with rimanere in Italian:
rimanere stupito (to be astonished)
rimanere stecchito (to be flabbergasted)
rimanere scioccato (to be shocked)
rimanere sorpreso (to be surprised)
rimanere senza (to be without, to have none left)
rimanere male (to have or to get one's feelings hurt)