Can do antonyms

What is the opposite word for Can do?

• improbable

  likely
• unlikely

  likely
• unimaginable

  likely
• unthinkable

  likely
• inconceivable

  likely
• unpractical
• impossible
• unreasonable
• rigid

  able and usually willing to change
• inflexible

  able and usually willing to change
• stiff

  able and usually willing to change
• hire

  be able
• employ

  be able
• cannot

  be able
• unrealizable
• unattainable
• ungettable
• intractable

  able and usually willing to change
• nonconforming

  able and usually willing to change
• unadaptable