lessen

decrease, diminish, lessen, reduce, dwindle

动词 lessen:

1. decrease in size, extent, or range
   同义词：decrease, diminish, fall
2. make smaller
   同义词：decrease, minify
3. wear off or die down
   同义词：subside

1. A gradation of a color made by adding white to it to lessen its saturation.
   淡色通过加白色使浓度变化而形成的一种颜色分级
2. Something that separates potentially antagonistic entities, as an area between two rival powers that serves to lessen the danger of conflict.
   缓冲物，缓冲地带可用来隔离潜在的对抗性因来的东西，如面敌对势力用来减轻冲突危险的地带
3. The pain was already lessening.
   疼痛已在减轻。

less.en

v.（动词）
less.ened,less.en.ing,less.ens
v.tr.（及物动词）
To make less; reduce.
使变小；使减少
Archaic To make little of; belittle.
【古语】 使变小，使缩小
v.intr.（不及物动词）
To become less; decrease.See Synonyms at decrease
变小；减少参见 decrease

来源：
Middle English lessen, lessenen
中古英语 lessen, lessenen
from lesse [less] * see less
源自 lesse [较少的，较小的] *参见 less