Break down
Fail to work
Bring down
Cause to fall, lower
Close down
Stop all work, cease trading
Cut down
Do something less often
Get down
Cause depression, make unhappy
Knock someone down
Strike to the ground or floor
Knock something down
Demolish
Lay down
Establish rules
Let down
Disappoint, not keep a promise
Pour down
Come down heavily (of rain)
Settle down
Live a quiet, routine life
Slow down
Go less fast
Turn down
Decrease volume
Refuse