The antonyms for the phrase "was dissolute" are quite simple. The word "dissolute" means someone who is immoral, indulgent, or debauched. The antonyms of "dissolute" would then be "virtuous," "moral," "upright," "decisive," and "restrained." People who are virtuous are known to have a sense of right and wrong, while the moral are guided by principles of ethical behavior. Upright individuals are honest and moral, and decisive ones are firm and resolute in their actions. Finally, restrained individuals have self-control, discipline, and refrain from excessive or indulgent behavior. Using these antonyms, one could make a statement such as "he was not dissolute but, rather, virtuous and had sound moral values.