a. [ From 7th Fit. ] Full of fits; irregularly variable; impulsive and unstable. [ 1913 Webster ]
After life's fitful fever, he sleeps well. Shak.
-- Fit"ful*ly, adv. -- Fit"ful*ness, n. [ 1913 Webster ]
The victorious trumpet peal Dies fitfully away. Macaulay.