requiring little hard work or exertion; "a painless solution to the problem" with as little pain as possible; "a humanely painless killing" not causing physical or psychological pain; "painless dentistry
Something such as a treatment that is painless causes no physical pain. Acupuncture treatment is gentle, painless, and, invariably, most relaxing a quick and painless death. painful + painlessly pain·less·ly a technique to eliminate unwanted facial hair quickly and painlessly. painfully
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. House-hunting is in fact relatively painless in this region + painlessly pain·less·ly a game for children which painlessly teaches essential pre-reading skills