ILLEST

Evil; wicked (of people).

Morally reprehensible (of behaviour etc.); blameworthy.

Indicative of unkind or malevolent intentions; harsh, cruel.

Example: "He suffered from ill treatment."

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

Example: "Ill manners; ill will"

Unwell in terms of health or physical condition; sick.

Example: "I've been ill with the flu for the past few days."

Having an urge to vomit.

Example: "Seeing those pictures made me ill."

(hip-hop slang) 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.

Example: "That band was ill."

Unwise; not a good idea.