wane

n. 减少, 衰微, 败落, 亏缺, 月亏
vi. 变小, 亏缺, 衰落, 消逝, 退潮
相关词组:
wane to the close
on the wane

动词过去式:waned 过去分词:waned 现在分词:waning 第三人称单数:wanes 

wane

v.intr.（不及物动词）
waned,wan.ing,wanes
To decrease gradually in size, amount, intensity, or degree; decline.
衰落：体积、数量、密度或程度的逐渐减小；衰退
To exhibit a decreasing illuminated area from full moon to new moon.
（月）亏，缺：从满月到新月期间表现出逐渐减小的明亮区
To approach an end.
结束：到达终点
n.（名词）
The act or process of gradually declining or diminishing.
衰退：逐渐没落或减小的行为或过程


A time or phase of gradual decrease.
衰退期：逐渐衰退的时间或阶段
The period of the decrease of the moon`s illuminated visible surface.
月亏期：月亮的可见的明亮部分逐渐变小的时期
A defective edge of a board caused by remaining bark or a beveled end.
缺角方木：方木的由剩余树皮或斜角末端引起的缺损的边缘

<习惯用语>on the wane
In a period of decline or decrease:
衰减：处于正在衰退或减少的时期：
例句：
.The tide was near the turn and already the day was on the wane.(James Joyce)
.潮水即将退去，白昼渐渐消逝.(詹姆斯·乔伊丝)

来源：
Middle English wanen
中古英语 wanen
from Old English wanian * see eu- 2
源自 古英语 wanian *参见 eu- 2