What does "contra-" signify in medical terminology?

In medical terminology, the prefix "contra-" signifies the meaning of "against." This prefix is commonly used to indicate opposition or resistance to a condition, disease, or treatment. For instance, terms like "contraceptive," which refers to methods that oppose conception, or "contraindication," which highlights a situation where a certain treatment should be avoided due to potential harm, illustrate the application of "contra-" in medical language. The prefix effectively conveys a sense of opposition, making it essential for accurately interpreting various medical terms.

The other options involve different meanings that do not apply in this context. "With" would relate more to "co-" or "con-," suggesting a union or togetherness. "Together" aligns similarly, emphasizing a combined or shared aspect. "After" is often associated with the prefix "post-," indicating a sequence in time rather than opposition. Understanding the specific meaning of "contra-" helps build a stronger foundation in medical terminology.