Step 1: Understand the word.
The word rescue means to save someone from danger or difficulty.
Step 2: Analyze the options.
Extricate means to free someone, which is similar to rescue.
Waver means to be uncertain, unrelated to rescue.
Bind means to tie or restrict, not the opposite.
Desert means to abandon someone, which is the opposite of rescuing.
Step 3: Conclusion.
Hence, the correct answer is Desert.