downward

形容词 downward:

1. on or toward a surface regarded as a base
2. extending or moving from a higher to a lower place
   同义词：down

副词 downward:

1. spatially or metaphorically from a higher to a lower level or position
   同义词：down, downwards, downwardly

1. She laid the picture face downward on the table.
   她把那幅画正面朝下放在桌上。
2. A downward incline or passage; a slope.
   斜面，斜坡向下的斜面; 倾斜面
3. The molten lava got into every nook and cranny on its downward path.
   熔岩向下流动时，无缝不钻，无孔不入。
4. A downward movement; descent.
   向下的运动; 下降
5. The monkey was hanging head downwards from the branch.
   猴子头向下倒挂在树枝上。

down.ward

adv.（副词）
adj.（形容词）
From a higher to a lower place, point, level, or condition:
向下的，降下的：指位置、点、平面或条件由高处降到低处：
例句：
floating downward; a downward trend.
向下漂流；下降趋势

From a prior source or earlier time:
往下：从一先前的来源或更早的时间来的：
例句：
passed downward through the ages.
一代代传下来

【引伸】
down.wardly
adv.（副词）
down.wards
adv.（副词）