This is the 989th most frequent Italian word.
arrivo
"Arrivo" means "arrival" in English.
Here, 'arrivo' functions as a noun referring to the act of arriving.
Il mio arrivo a Roma è stato memorabile.
My arrival in Rome was memorable.
In this sentence, 'arrivo' is a verb in the first person singular form of 'arrivare,' meaning 'to arrive.'
Quando arrivo, ti chiamo subito.
When I arrive, I will call you immediately.
Here, 'arrivo' is used as a noun indicating the moment of arrival.