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Webster 1913 Edition

Adj.

Without events; tame; monotonous; marked by nothing unusual; uneventful.

eventless ‎(not comparable)

Without events; uneventful.
- 1933, George Orwell, Down and Out in Paris and London, Chapter XXXIII,
  Meanwhile we went on with the lodging-house life—a squalid, eventless life of crushing boredom.
- Roger Ebert
  Life on board the Discovery is presented as a long, eventless routine of exercise, maintenance checks, and chess games with HAL.