Meaning

noun a fit of shivering or shaking

noun successive stages of chills and fever that is a symptom of malaria

noun a mark (') placed above a vowel to indicate pronunciation

originFrom Middle English agu, ague, borrowed from Middle French (fievre) aguë, “acute (fever)” (Modern French fièvre aiguë), from Late Latin (febris) acuta (“acute fever”), from Latin acūtus (“sharp, acute”) + febris (“fever”). Doublet of acute.

Etymology from Wiktionary, CC BY-SA 3.0