continual

1. Recurring regularly or frequently in a prolonged and closely spaced series (synset 300594915)
   "the continual banging of the shutters"
   similar to:

   • insistent, repetitive - repetitive and persistent
   • running - continually repeated over a period of time
   • perennial, recurrent, repeated - recurring again and again
   • persistent, relentless, unrelenting - never-ceasing
   • recurring, revenant - coming back
2. Having no interruptions (synset 300598545)
   "`continual' is often used interchangeably with `continuous'"
   similar to: continuous, uninterrupted - continuing in time or space without interruption

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