Origin of ague
- Middle English from Old French (fievre) ague sharp (fever) from Medieval Latin (febris) acūta from Latin feminine of acūtus acute
From American Heritage Dictionary of the English Language, 5th Edition
- Middle English agu, ague, from Old French and Middle French (fievre) aguë, “acute (fever)” (Modern French fièvre aigüe), from Late Latin (febris) acuta (“acute fever”), from acūtus (“sharp, acute”) + febris (“fever”).
- Cognate to acute.