A disagreeable, irritable, or malevolent disposition.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "ill nature" in a sentence
"The ill nature of the cartoon, for instance, which showed Tish in a pair of khaki trousers on her back under a racing-car was quite uncalled for."
"Half the ill nature in the world arises from people being dull, and having nothing to excite them, and then the temptation to become sententious about their neighbours is beyond the virtue of human nature to resist."
"But Ted, Monica, and Woe Betide didn't know of the ill nature of Surprise Seven."