strike up

verb3

1. •
   To start something with somebody else, such as a conversation or relationship.

   • To make him feel welcome, she struck up a conversation with the newly arrived guest.
   • He struck up a friendship with Redford that was to last for many years.
2. •
   To start something, usually playing live music.

   • The band struck up and everyone started to dance.
   • The bride entered the church just as the "Wedding March" struck up.
3. •
   To raise (as sheet metal), in making dishes, pans, etc., by blows or pressure in a die.