Adjective painless has 3 senses
- painless - requiring little hard work or exertion; "a painless solution to the problem"
Antonyms: difficult, hard (indirect, via easy)
- painless - not causing physical or psychological pain; "painless dentistry"
Antonyms: painful, aching, achy, agonized, agonised, agonizing, agonising, excruciating, harrowing, torturing, torturous, torturesome, burning, chafed, galled, poignant, racking, wrenching, saddle-sore, sensitive, sore, tender, smarting, traumatic, biting, bitter, prickling, stinging, tingling
- painless - with as little pain as possible; "a humanely painless killing"
Antonym: inhumane (indirect, via humane)