plural of 'ill

Not well; imperfectly, badly

(often pluralized) Trouble; distress; misfortune; adversity. / Harm or injury. / Evil; moral wrongfulness. / A physical ailment; an illness. / (US, slang, uncountable) PCP, phencyclidine.

(intransitive, slang) To behave aggressively.

plural of ill

A spiteful or vengeful attitude; a grudge; dislike.

of, or relating to an illation. / (grammar) of, or relating to the grammatical case that in some languages indicates motion towards or into something.

(grammar) a word or phrase that expresses an inference (such as for or therefore). / an illation. / (grammar) the illative case, or a word in that case.

plural of illative

not well; sick