1. Somewhat ill, feeling or being in bad health
   "my poor ailing grandmother";
   - indisposed, peaked, poorly, sickly, unwell, under the weather [informal], seedy [archaic], out of sorts [informal], off-colour [Brit, informal], grotty [Brit, informal], crook [Austral, NZ, informal], cruddy [informal]

1. Be ill or unwell
   "What ails you today?"
    
2. Cause bodily suffering to and make sick or indisposed
   "The chronic back pain ailed him for years";
   - trouble, pain

See also: ill, sick

Type of: ache, hurt, suffer

Encyclopedia: Ailing