1. 形容詞
   無痛的, 不痛的
   不痛不癢的
   容易的
   

   同義字詞
   cheap,downhill,easy,effortless,facile,fluent,fluid,hands-down,light,ready,royal,simple,smooth,snap,soft
   

例句

1. But in a painless kind of way.
2. It is painless having it done .
3. I know, it wasn't quite painless .
4. Almost * too * easy and painless .
5. Radiation therapy is in itself painless .
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