Most unfavorably
Else clues• If all else fails
• If all goes wrong
• If everything else fails
• If everything fails
• If everything goes as badly as possible
• If everything goes wrong
• Least desirably
• Least favorably
• Least optimally
• On one extreme
• Pessimist's hypothetical
• Under the least favorable circumstances
• Under the most negative circumstances
• Under truly awful circumstances