strike up

/S T R AY1 K AH1 P/
verb
  1. 1

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

    โ€œHe struck up a friendship with Redford that was to last for many years.โ€

  2. 2

    To start something, usually playing live music.

    โ€œThe band struck up and everyone started to dance.โ€

  3. 3

    To raise (as sheet metal), in making dishes, pans, etc., by blows or pressure in a die.

Source: https://en.wiktionary.org/wiki/strike%20up