In an English translation of a poem by the 13th-century Persian poet Rumi, the speaker observes, “Inside each of us, there’s continual autumn. Our leaves fall and are blown out over the water.” The poem emphasizes cycles of transformation and growth, akin to the changing seasons. Here, “continual” refers to a recurring event: autumn. The adjective is often used this way, as a synonym for “recurring,” to describe something that happens frequently or cyclically, with pauses in between.
The term “continual” has two uses: first, as a reappearing action or event (as described above), and second, as something that continues indefinitely without interruption. The latter definition is quite old, dating to the 14th century. But can a similar word — “continuous” — take the place of “continual”? In certain contexts, yes.
“Continual” and “continuous” sometimes overlap in meaning, both deriving from the Latin continuus, meaning “joining, connecting with something; following one after another.” “Continuous” also describes an action that continues indefinitely, though it emerged later, in the 17th century. By etymology standards, either word can describe uninterrupted action or events.
However, since the mid-19th century, many commentators have recommended distinguishing the two, favoring “continuous” for a nonstop action and “continual” for repeated actions with pauses. Consider this example: Rain might fall continuously (the adverb form) during a long storm, but continual showers occur again and again throughout the wet season.
So, when describing an action that recurs with interruptions or in cycles, as seen in Rumi’s poem, the preferred term is “continual.” For something nonstop, use “continuous.” While the two words share historical overlap, being mindful of this distinction can improve your writing.
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