Having a downward motion
forward, headlong, downward, downhill, downstairs, bottomward, downgrade, on a downward course, from higher to lower, to the bottom, downwardly, in a descending direction, to a lower position, declining, falling, descending, gravitating, slipping, sliding, cascading, sagging, precipitating, slumping, dropping, sinking, earthward, groundward, southward, hellward.
Antonyms up*, upward, rising.