1. 无痛(苦)地,不引起痛苦地：painfully 痛苦地,费力地 | painlessly 无痛(苦)地,不引起痛苦地 | painless 无痛的, 不痛的
2. 无痛苦地：painless 无痛的 | painlessly 无痛苦地 | painlessly 不痛地
3. 不痛地：painlessly 无痛苦地 | painlessly 不痛地 | pains 辛苦痛苦
4. 毫无痛苦地：ruthlessly 无情地 | painlessly 毫无痛苦地 | instantaneously 瞬间地;即刻地
1. Our experience shows that very few companies can painlessly carry off a merger or an acquisition.
2. " Our goal was to be able to end life within 30 seconds absolutely painlessly, " he said.
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3. Organisers could also be satisfied that lesser problems were solved quickly and painlessly.
adv
1. without pain
e.g. after the surgery, she could move her arms painlessly