Antonyms for the word "be reprehensible" would include words that suggest actions or behaviors that are admired or accepted by society. Examples of these antonyms might include "commendable," "meritorious," "virtuous," or "exemplary." Other antonyms might include "acceptable," "justifiable," or "forgivable," suggesting that an action or behavior may not necessarily be ideal, but is at least understandable given certain circumstances. In contrast to "reprehensible," these words suggest a level of morality or ethics that is considered acceptable or even admirable, and may be used to describe individuals, actions, or situations that are seen as positive forces in society.