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Webster 1913 Edition

Adj.

Without pause or end; incessant.

adv.

Without intermission or end.

Adj.

Without a stop or pause; incessant; continual; without intermission.

All these with ceaseless praise his works behold.

Endless; enduring for ever; as the ceaseless joys of heaven.

ceaseless ‎(not comparable)

Without an end.
Without stop or pause, incessant.
- 2006, Edwin Black, chapter 2, in Internal Combustion:
  Buried within the Mediterranean littoral are some seventy to ninety million tons of slag from ancient smelting, about a third of it concentrated in Iberia. This ceaseless industrial fueling caused the deforestation of an estimated fifty to seventy million acres of woodlands.

without an end