bear down on bear down on /bɛr daʊn ɒn/

verb

1. () Sail towards another vessel, of a ship  ( bear down upon , bear down on )
   sail towards another vessel, of a ship
   
2. Exert a force with a heavy weight  ( bear down on , drag down , weigh down , bear down , press down on )
   exert a force with a heavy weight
    The snow bore down on the roof
   The snow bore down on the roof