1. A wooden peg for hanging things on 
2. A knot in wood; a protuberance
   - knur

Derived forms: knags

• immunofluorescence
• immunogen
• immunogenic
• immunogenicity
• immunoglobulin
• immunoglobulin A
• immunoglobulin D
• immunoglobulin E
• immunoglobulin G
• immunoglobulin M
• immunohistochemistry
• immunologic
• immunologic response
• immunological
• immunological disorder
• immunologically
• immunologist
• immunology
• immunopathology
• immunosuppressant
• immunosuppressed
• immunosuppression
• immunosuppressive
• immunosuppressive drug
• immunosuppressor