rušiti

1. (of buildings) to demolish; to pull down
   Ruše staru zgradu u našoj ulici. — They're pulling down the old building on our street.
2. (also figuratively) to destroy; to wreck; to bring down
   Ne ruši mi snove, molim te. — Please don't shatter my dreams.
   Takve odluke ruše poverenje građana. — Such decisions are destroying citizens' trust.
3. (rušiti se) to collapse; to fall apart; to crash
   Ova kuća se ruši, niko je ne održava. — This house is falling apart, nobody maintains it.
   Sajt se stalno ruši zbog velikog broja korisnika. — The website keeps crashing because of heavy traffic.
4. colloq. (of exams) to fail
   Taj profesor ruši pola godine. — That professor fails half the class.

Rušiti rekord means 'to break a record'.