What is the meaning of Ill?

Evil; wicked (of people).

Morally reprehensible (of behaviour etc.); blameworthy.

Indicative of unkind or malevolent intentions; harsh, cruel.

Unpropitious, unkind, faulty, not up to reasonable standard.

Unwell in terms of health or physical condition; sick.

Having an urge to vomit.

Sublime, with the connotation of being so in a singularly creative way.

Extremely bad (bad enough to make one ill). Generally used indirectly with to be.

Unwise; not a good idea.

Bad-tempered.

Michiel de Vaan, Etymological Dictionary of Latin and the Other Italic Languages, s.v. "ulcus" (Leiden: Brill, 2008), 637.

Not well; imperfectly, badly

Trouble; distress; misfortune; adversity.

Harm or injury.

Evil; moral wrongfulness.

A physical ailment; an illness.

PCP, phencyclidine.

To behave aggressively.

bad

sore

angry, wroth

strong, very

inflection of illr:

  1. strong feminine nominative singular
  2. strong neuter nominative/accusative plural

strong feminine nominative singular

strong neuter nominative/accusative plural

ill

Alternative form of woul (will)

ill

bad, evil, wicked

harsh, severe

profane

difficult, troublesome

awkward, unskilled

ill

badly, evilly, wickedly

harshly, severely

profanely

with difficulty

awkwardly, inexpertly

ill

ill will, malice

Source: wiktionary.org