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late 15c., from Medieval Latin remonstrationem (nominative remonstratio), noun of action from past participle stem of remonstrare (see remonstrance).
1590s, "make plain," back-formation from remonstration, or else from Medieval Latin remonstratus, past participle of remonstrare "to demonstrate" (see remonstrance). Meaning "to exhibit or present strong reasons against" is from 1690s. Related: Remonstrated; remonstrating.