This is the 896th most frequent Italian word.
alcun
"Alcun" means "any" or "some" in English, typically used in negative or interrogative contexts.
In this sentence, 'alcun' is used to negate any doubt, emphasizing the complete absence of uncertainty.
Non ho alcun dubbio sul suo talento.
I have no doubt about their talent.
Here, 'alcuna' is used to inquire about the presence of any news, emphasizing the possibility of some information.
Hai ricevuto alcuna notizia da loro?
Have you received any news from them?
In this example, 'alcuna' is used to underline the absolute absence of hesitation, adding emphasis to the statement.