painless
['peinlis]
adj. 无痛的；不痛的
反义词
参考例子
1.This method is quick and painless!
这种方法是快速方便。
2.This will not be a painless process, and many mistakes will be made along the way.
这不会是一帆风顺的过程，路途中将会犯下很多的错误。
3.But now, laser surgery is a relatively painless alternative to face lifts and skin tucks.
而今，激光外科提供了一种相对来说痛苦较少的整容和拉皮术。
英文解释
adj.
1.requiring little hard work or exertion
2.not causing physical or psychological pain
网络释义
painless
无痛的; 无痛; 不痛; 慢金属;
painless labour
释义：无痛分娩;
Painless Dental
无痛牙科;
painless tic
无痛性抽搐;
Painless pancreatitis
释义：无痛胰腺炎;