broaden

/B R AO1 D AH0 N/
verb
  1. 1

    To make broad or broader.

    โ€œTravel broadens the mind.โ€

  2. 2

    To become broad or broader.

    โ€œThe roads gradually broadened as we drove into the countryside.โ€

    syn:widen

Source: https://en.wiktionary.org/wiki/broaden