【lev】
“to raise，to lighten” “举起，提起；使变轻”
|lever=lev+er n.杠杆 v.把···作为杠杆
-er “物品；机器”
eg：He worked a lever to lift the lid of the machine.
|alleviate=al+lev+ate v.减轻，缓和
al- "一再"
eg：Nowadays, a great deal can be done to alleviate the pain.
|relevant=re+lev+ant a.相关的；有意义的
eg: He mentioned the relevant laws.
【词汇扩展】
elevate v.提升，举起
leverage n.手段 v.利用
levity n.多变；
levy n.征收 v.征税；征兵
（以上均来自《200个一定要学的英文词根词缀》一书）
