continuous

amaranthine around-the-clock ceaseless chronic consecutive constant continual direct endless entire eternal even everlasting extending flowing gradational gradual habituated illimitable incessant insistent interminable invariant level lingering measureless more constant more even never-ending perpetual planar progressive protracted protractile renewable repeating round-the-clock sempiternal sequent sequential smooth smoother smoothest steady steady-going step-by-step straight successional sustainable sustained unbounded unceasing unchanged unending unfailing uninterrupted unrelenting unremitting