strike up

US /straɪk ʌp/
UK /straɪk ʌp/
"strike up" picture
1.

to start a conversation or relationship with someone

:
He always tries to strike up a conversation with strangers.
They struck up a friendship during their trip.
2.

to start playing music

:
The band struck up a lively tune.
As soon as the clock struck noon, the bells struck up.