1. (a.) Of habitual bad temper; surly; peevish\; fractious; cross; crabbed; as, an ill-natured person.

2. (a.) Dictated by, or indicating, ill nature; spiteful.

3. (a.) Intractable; not yielding to culture.

bad-tempered bitter crabbed cranky cross crusty dour evil-disposed evil-tempered gloomy ill-affected ill-conditioned ill-disposed ill-humored ill-intentioned ill-tempered malevolent morose petulant sour sulky