1. Not encumbered with a physical burden or load
   - burdenless, unburdened

See also: unencumbered

• immunized
• immunizing agent
• immunoassay
• immunochemical
• immunochemical assay
• immunochemistry
• immunocompetence
• immunocompetent
• immunocompromised
• immunodeficiency
• immunodeficient
• immunoelectrophoresis
• immunofluorescence
• immunogen
• immunogenic
• immunogenicity
• immunoglobulin
• immunoglobulin A
• immunoglobulin D
• immunoglobulin E
• immunoglobulin G
• immunoglobulin M
• immunohistochemistry
• immunologic
• immunologic response