noun
wandering monk; itinerant monk on pilgrimage
A yojijukugo describing a Zen monk traveling on foot to many places for training and pilgrimage. Often used in Buddhist contexts.
彼は若い頃、雲水行脚の旅に出た。
In his youth, he set out on a journey as a wandering monk.
Compound of 雲水 (unsui, 'clouds and water', a term for a traveling Zen monk) and 行脚 (angya, 'pilgrimage, traveling on foot'). The exact historical derivation is uncertain; the phrase is a yojijukugo used in Zen Buddhism.