The word "doth exterminate" is an outdated phrase that means "causes to be destroyed completely." Its antonyms are words that mean the opposite, such as "spares," "preserves," "protects," "saves," "guards," and "rescues." These words imply mercy, compassion, and kindness, and are associated with the concept of preservation rather than destruction. By using these words, people can express the opposite of "doth exterminate" in their speech or writing, and communicate a message of hope and survival, rather than one of despair and annihilation. Therefore, it is important to choose our words carefully and intentionally, and to consider their implications and connotations.