1. Be oppressive or disheartening to
   "The constant stress weighed down her mind";
   - weigh on, drag down
    
2. Exert a force with a heavy weight
   "The snow weighed down on the roof";
   - drag down, bear down, bear down on, press down on

Derived forms: weighed down, weighing down, weighs down

Type of: press, sadden

Antonym: lighten up