strike up
US /straɪk ʌp/
UK /straɪk ʌp/

1.
attaccare, instaurare
to start a conversation or relationship with someone
:
•
He always tries to strike up a conversation with strangers.
Cerca sempre di attaccare bottone con gli sconosciuti.
•
They struck up a friendship during their trip.
Hanno instaurato un'amicizia durante il loro viaggio.