never-ceasing

Night and day the great work went on, never ceasing, persistent, relentless.

Young persons would find Tours a delightful residence, as there is a never-ceasing course of balls and parties.

She led him to his own cage, never ceasing to talk, locked the door, then turned and walked thoughtfully toward the bungalow.

The light advanced toward them; then it drew back again, never ceasing to sparkle.

But when the morning came, there was no attack, only the never-ceasing shelling, which seemed to increase as time passed.