Final answer:
The opposite of malignant is benign.
Step-by-step explanation:
The term that is the opposite of malignant is benign. A benign neoplasm or tumor is one that does not invade other tissues, does not form metastases, and stops growing by itself. On the other hand, a malignant neoplasm or tumor is an actual cancer that invades surrounding tissues, forms metastases, and poses a greater risk to overall health.