break into
US /breɪk ˈɪntuː/
UK /breɪk ˈɪntuː/

1.
to enter a building or car illegally, especially by force
:
•
Someone tried to break into my house last night.
•
The thieves managed to break into the bank vault.
2.
to start doing something suddenly
:
•
She suddenly broke into a run.
•
The audience broke into applause.
3.
to enter a market or industry, especially with difficulty
:
•
It's hard for new companies to break into the tech industry.
•
She hopes to break into the music business.