Proceeding without interruption or cesstaion; continuous; unceasing; lasting; abiding.

seemingly without interruption; chiefly restricted to what recurs regularly or frequently in a prolonged and closely spaced series; "the continual banging of the shutters"

`continual' (meaning seemingly uninterrupted) is often used interchangeably with `continuous' (meaning without interruption)

Occuring in steady and rapid succession; very frequent; often repeated.