We must talk, think, and live up to the spirit of the times, and write up to it too, if that cacoethes be upon us, or else we are nought.
-- Anthony Trollope, Barchester Towers
A cacoethes for travel seemed suddenly to have possessed the old gentleman, and an airy allusion to Damascus had struck her dumb.
-- Leonard Merrick, The worldlings
Cacoethes stems from the Greek kakoethes, a combination of the roots kakos, "bad," and ethes, "character." The word occurs famously in Juvenal's Latin phrase insanabile scribendi cacoethes, "incurable passion for writing."