coil

"What coil are you keeping down there, Mullugutherum?"

--The Silver Chair, by C. S. Lewis, written around 1953; p, 157 of the 1994 HarperTrophy paperback edition

MW11 says "coil" means "turmoil" or "trouble"; also, I never knew what Shakespeare's "mortal coil" meant--turns out it refers to (as MW11 puts it) "everyday cares and worries."