noun

1. (often pluralized) Trouble; distress; misfortune; adversity.

   “Music won't solve all the world's ills, but it can make them easier to bear.”

2. Harm or injury.

   “I wouldn't want you to do me ill.”

3. Evil; moral wrongfulness.

adjective

1. Evil; wicked (of people).

2. Morally reprehensible (of behaviour etc.); blameworthy.

3. Indicative of unkind or malevolent intentions; harsh, cruel.

   “He suffered from ill treatment.”

Synonyms: bad, mal-, disgusted, nauseate, nauseous, sick, sickened, dope

adverb

1. Not well; imperfectly, badly; hardly.

Synonyms: illy