What does the prefix "contra-" mean?

The prefix "contra-" comes from Latin, meaning "against" or "opposite." It is commonly used in medical terminology to indicate opposition or contradiction to a particular condition or state. For instance, in the term "contraception," the prefix "contra-" signifies against conception. This usage highlights how the prefix conveys the idea of being opposed to something, making the correct answer clear in the context of medical terms. The other options do not capture this meaning and pertain to different concepts unrelated to opposition or contradiction.