Most condign is an expression that means the most appropriate or fitting punishment. Synonyms for this phrase might include words like most deserved, most corrective, or most just. Other options might include words like most retributive, most appropriate, or most proportional. Depending on the context, it may make sense to use more forceful or specific synonyms, such as most punitive, most severe, or most fitting. Ultimately, the most appropriate synonym for most condign will depend on the specific situation, as well as the person or group applying the punishment. Whether you're a judge, a teacher, or a parent, choosing the right synonym can help you ensure that the punishment fits the crime.