incapable - definition and synonyms

adjective 

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/ɪnˈkeɪpəb(ə)l/
  1. 1
    unable to do something
    incapable of:

    professors who seem incapable of any original thought

    incapable of doing something:

    The army was badly equipped, and incapable of offering serious resistance.

    The city’s road system is incapable of handling the current volume of traffic.

    1. a.
      too honest or morally good to behave in a certain way

      I knew that she was incapable of telling a lie.

  2. 2
    completely lacking skill or ability

    She made me feel stupid and incapable.

  3. 3
    British unable to look after yourself or to behave normally

    Who will look after your affairs if you become mentally incapable?

see note at capable