lower
noun.
the lower of two berths
Synonym: lower berth
verb.
move something or somebody to a lower position
take down the vase from the shelf
verb.
set lower
lower a rating|lower expectations
Synonym: lour
verb.
make lower or quieter
turn down the volume of a radio
Synonym: lour, turn down
verb.
cause to drop or sink
The lack of rain had depressed the water level in the reservoir
Synonym: depress
verb.
look angry or sullen, wrinkle one's forehead, as if to signal disapproval
Synonym: frown, glower, lour
Antonym: raise