Literature Reference: 乱猨心本定，流水性长闲。—— 《送少微上人入蜀》 Though the chaotic monkeys' hearts are settled, the nature of flowing water is eternally leisurely. Source from 'Song Shaowei Shangren Ru Shu'.
长: Strengths, merits.
闲: Leisure, tranquility, and serenity. In a name, it often conveys a sense of seclusion and peaceful elegance.
Meaning: Eternal leisure signifies a long-lasting tranquility and a peaceful state of mind, like the leisurely flow of water.