One must be willing to endure some inconvenience or discomfort in order to achieve worthwhile goals.

(American spelling, often plural) alternative form of labour pain

(British spelling, often plural) the pain suffered by a woman in labour during childbirth.

without pain, free of pain.

Racked with pain, in pain, suffering.

that relieves pain

(law) A species of damages that one may recover for physical or mental pain that results from a wrong done. / Used other than figuratively or idiomatically: see pain, suffering.

Pain felt in the back.

(medicine) Pain caused by damage to nerves or by damage to the brain, brainstem, or spinal cord.

The minimum intensity or duration of a sensory stimulus applied to a living being at which it becomes considered painful.