"계율" refers to the set of moral precepts or rules that guide the behavior of individuals, particularly in the context of Buddhism. These guidelines help practitioners cultivate ethical conduct, mental discipline, and wisdom. The most well-known set of precepts in Buddhism includes the Five Precepts, which encourage non-harming, truthfulness, and respect for others. In addition to the Five Precepts, there are more specific rules for monks and nuns, known as the Vinaya. These rules help maintain the integrity of the monastic community and support spiritual development. Overall, "계율" serves as a foundation for ethical living and personal growth in Buddhist practice.