bear down
verb.
exert a force with a heavy weight
The snow bore down on the roof
verb.
contract the abdominal muscles during childbirth to ease delivery
Synonym: overbear
verb.
to make a rush at or sudden attack upon, as in battle
he saw Jess charging at him with a pitchfork
Synonym: charge
verb.
exert full strength
The pitcher bore down
verb.
pay special attention to
The lectures bore down on the political background
verb.
exert a force or cause a strain upon
This tax bears down on the lower middle class