Something such as a treatment that is painless causes no physical pain.
例句
Acupuncture treatment is gentle, painless, and, invariably, most relaxing...針灸療法柔和，無痛，而且總是令人非常放松。The operation itself is a brief, painless procedure.手術本身耗時短且沒有痛苦。
ADJ-GRADED
不費勁的；容易的
If a process or activity is painless, there are no difficulties involved, and you do not have to make a great effort or suffer in any way.
例句
House-hunting is in fact relatively painless in this region...在這個地區找房子事實上相對比較容易。There are no easy or painless solutions to the nation's economic ills.這個國家的經濟弊病沒有輕松便捷的解決辦法。
英英詞典釋義
Adverb
1. without pain;
"after the surgery, she could move her arms painlessly"