The adjective continual describes something that's recurring, that happens again and again. If your pet wolf keeps up his continual howling all night, your neighbors will let you know about it.

Something continual doesn't seem to stop. Your continual nightmares about terrifying clowns occur night after night, and the continual interruptions of your adorable nephew while you're talking on the phone will probably seem less and less cute the longer they continue. The Latin root word is continuus, "uninterrupted," and if you're truly talking about something going on without pause, you'll want to use the word continuous instead.

Definitions of continual

adj occurring without interruption; chiefly restricted to what recurs regularly or frequently in a prolonged and closely spaced series

“the continual banging of the shutters”
insistent, repetitive
repetitive and persistent
continually repeated over a period of time
perennial, recurrent, repeated
recurring again and again
persistent, relentless, unrelenting
recurring, revenant
coming back
recurring in scattered and irregular or unpredictable instances
fitful, spasmodic
occurring in spells and often abruptly
stopping and starting at irregular intervals
occasional, periodic
recurring or reappearing from time to time
irregular, unpredictable
not occurring at expected times
isolated, stray
not close together in time
discontinuous, noncontinuous
not continuing without interruption in time or space
not frequent; not occurring regularly or at short intervals
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adj `continual' (meaning seemingly uninterrupted) is often used interchangeably with `continuous' (meaning without interruption)

continuous, uninterrupted
continuing in time or space without interruption

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