及物动词
1. The talk lessened the tension.
这次交谈缓和紧张局面。
不及物动词
1. The heat will lessen during the evening.
晚上热气会减弱。
1. 减少(生产成本)：lengthen 延长 | lessen 减少(生产成本) | level 水平
2. 下降：上升:increase, rise ,ascend ,core, surge,go up, climb ,mount ,level... | 下降: decrease, fall, drop ,descend ,decline ,reduce ,lessen ,level down | 波动:fluctuate ,fluctuation ,rise and falls ,up and d...
3. 减少：lesson#功课 | lessen#减少 | return#回来
4. 使小;变小;减少：lesser更少的(地更小的(地) | lessen使小;变小;减少 | lesson教训, 训诫, 惩戒
1. （使）缩小；（使）减少；（使）减轻
If something lessens or you lessen it, it becomes smaller in size, amount, degree, or importance.
e.g. He is used to a lot of attention from his wife, which will inevitably lessen when the baby is born...
他习惯了妻子对他的百般关注，但孩子出生后这种关注就会不可避免地减少。
e.g. Make sure that your immunisations are up to date to lessen the risk of serious illness.
要确保接种最新的疫苗，以降低患上严重疾病的危险。
verb
1. decrease in size, extent, or range
e.g. The amount of homework decreased towards the end of the semester
The cabin pressure fell dramatically
her weight fell to under a hundred pounds
his voice fell to a whisper
2. wear off or die down
e.g. The pain subsided
Synonym: subside
3. make smaller
e.g. He decreased his staff