音标：['peinlis] ；柯林斯词典等级：1 级；

a. 无痛的, 不痛的
[医] 无痛的

s. requiring little hard work or exertion
a. not causing physical or psychological pain

词性分布：

形容词100%

painless的用法和样例：

例句

用作形容词(adj.)

The scan is safe, quick and painless.扫描过程是安全、快速和无痛的。
The most common presenting symptom is a painless mass.主要的临床症状为无痛性肿瘤。
Walking is an easy, painless and powerful form of exercise.走路是一种简单、不痛苦又有效的运动。

词汇搭配

swollen painless testicles木肾
painless myocardial infarction无痛性心肌梗塞...
painless labor无痛分娩

经典引文

My mother claims that his was a painless birth.
出自：T. Watada

【近义词】

effortless容易的
easy容易的
trouble-free可靠的,无故障的...
unproblematic不成问题的
simple简单的
straightforward易懂的

【反义词】

painful痛苦的

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