happening very often or with only short breaks
constant, incessant
going on without stopping
constant, unending
without beginning or end; lasting for ever
without pause; endless
going on for ever
infinite, never-ending
living for ever; never forgotten
death-defying, imperishable
continual; often repeated
never-ending, persistent
boring because (too) long
infinite
without stopping
never-ending, persistent
not stopping
continual