Related Clues:

• 'That's beyond me'
• 'Sorry, made other plans'
• 'Too frustrating for me!'
• "It's impossible!"
• "Sorry, have plans"
• "There are no words"
• “Sorry, too busy”
• “Unable to make it, sorry”
• 'That's out of the question'
• Words from one who's unable
• 'Sorry, already got plans'
• 'This is too much for me'
• Defeatist's statement
• 'It's hopeless!'
• 'Sorry, unavailable'