perpetual

continual, continuous, constant, incessant, perpetual, perennial mean characterized by continued occurrence or recurrence. continual often implies a close prolonged succession or recurrence.

• • continual showers the whole weekend

continuous usually implies an uninterrupted flow or spatial extension.

• • football's oldest continuous rivalry

constant implies uniform or persistent occurrence or recurrence.

• • lived in constant pain

incessant implies ceaseless or uninterrupted activity.

• • annoyed by the incessant quarreling

perpetual suggests unfailing repetition or lasting duration.

• • a land of perpetual snowfall

perennial implies enduring existence often through constant renewal.

• • a perennial source of controversy