Reiterate

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late Middle English (in the sense ‘do an action repeatedly’): from Latin reiterat- ‘gone over again’, from the verb reiterare, from re- ‘again’ + iterare ‘do a second time’.

wiktionary

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Early 15th century, from Late Latin reiteratus, past participle of reiterare(“to repeat”) from re-(“again”) + iterare(“repeat”) from iterum(“repeat”). [1]

etymonline

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reiterate (v.)

early 15c., reiteraten, "to repeat (an action or process) again and again," originally in medicine and alchemy, from Late Latin reiteratus, past participle of reiterare "to repeat," from re- "again" (see re-) + iterare "to repeat," from iterum "again" (see iteration). From mid-16c. especially "to say repeatedly, give repeated expression to." Related: Reiterated; reiterating.