[ague] n [ME, fr. MF ague, fr. ML (febris) acuta, lit., sharp fever, fr. L, fem. of acutus sharp--more at acute] (14c) 1: a fever (as malaria) marked by paroxysms of chills, fever, and sweating that recur at regular intervals
2: a fit of shivering: chill -- agu.ish adj