Adjective: unceasing ,ún'see-sing
- Continuing forever or indefinitely
"the unceasing themes of love and revenge";
- ageless, aeonian, eonian [N. Amer], eternal, everlasting, perpetual, unending, eviternal [archaic]
- Continuing forever, or for an indefinitely long time
"man's unceasing warfare with drought and isolation";
- ceaseless, constant, incessant, never-ending, perpetual, unremitting
See also: continuous, lasting, permanent, uninterrupted