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Adjective: rigid  ri-jid
  1. Incapable of or resistant to bending
    "a rigid strip of metal"; "a table made of rigid plastic";
    - stiff
  2. Incapable of compromise or flexibility
    - strict
  3. Incapable of adapting or changing to meet circumstances
    "a rigid disciplinarian";
    - inflexible, unbending
  4. (aeronautics) designating an airship or dirigible having a form maintained by a stiff unyielding frame or structure
  5. Unchanging and unmoving
    "a face rigid with pain";
    - fixed, set

See also: inflexible, intolerant, nonmoving, semirigid, unadaptable, unmoving

Antonym: nonrigid

Encyclopedia: Rigid