ageless amaranthine articulated catenated ceaseless coeternal concatenated connected constant continual continued continuing continuous cyclical dateless direct endless eternal eterne ever-being ever-durable ever-during everlasting everliving featureless gapless immediate immemorial immortal incessant indestructible infinite interminable joined jointless linked monotonous never-ceasing never-ending nonstop nonterminating nonterminous olamic perdurable perennial periodic permanent perpetual recurrent repetitive round-the-clock running seamless sempiternal serried smooth stable steady straight timeless twenty-four-hour unbroken unceasing undifferentiated uniform unintermitted unintermittent unintermitting uninterrupted unrelieved unremitting unstopped without end