WordNet: ill nature

a disagreeable, irritable, or malevolent disposition

• hypernym disposition, temperament

• hyponym crabbedness, crabbiness, crossness

• hyponym contrariness, crankiness, crotchetiness, grumpiness

• hyponym moroseness, sourness, sulkiness, sullenness

• hyponym biliousness, irritability, peevishness, pettishness, snappishness, surliness, temper

• hyponym impatience

• hyponym shrewishness

• hyponym asperity, sharpness

ill nature

• (englanti) good nature (antonym)
• (suomi) häijyys (synonyymi)