('ill' is often used as a combining form) in a poor or improper or unsatisfactory manner; not well "the team played poorly" - ill, badly
Adjective: poorlypûrlee or porlee
Somewhat ill or prone to illness "feeling poorly" - ailing, indisposed, peaked, sickly, unwell, under the weather, seedy, out of sorts, off-colour [Brit], crook [Austral, NZ]