What does the prefix bene- mean?
Bene- comes from the Latin bene, which means "well" or "good". It shows that something is good, positive or does good for someone. Its opposite is mal-, which means "bad". If a word starts with bene-, think of something that benefits.
The bene- family of words
Bene- sits at the center of a family of words about goodness: kindness toward others, helpful effects and generous gifts. A good test is to ask whether swapping bene- for mal- would flip the meaning, because the two are mirror images. In medicine, bene- can also signal that something is not harmful. The prefix appears in ethics, religion and health, always with the same central idea: goodness.