Lowers

To frown; to look sullen.

To be dark, gloomy, and threatening, as clouds; of the sky: to be covered with dark and threatening clouds; to show threatening signs of approach, as a tempest.

To let descend by its own weight, as something suspended; to let down

"lower a bucket into a well"

To pull down

"to lower a flag"

To reduce the height of

"lower a chimney or turret"

To depress as to direction

"lower the aim of a gun"