malignity (n.)

late 14c., malignite, "extreme enmity or evil disposition toward another, deep-rooted spite," from Old French maligneté, from Latin malignitas "ill-will, spite," from malignus "mean, unkind," from male "badly" (see mal-) + -gnus "born," from gignere "to bear, beget," from PIE root *gene- "give birth, beget." Meaning "quality of being extremely evil" is from 1530s.