water emerging from a stone wall
Rare term referring to spring water seeping out from between the stones of a wall, often in traditional Japanese gardens or old castle walls.
The water trickling from the stone wall in the garden makes a refreshing sound.
清水 is a common word for 'spring water' or 'clear water', while 岩垣清水 specifically describes water emerging from a stone wall.
Compound of 岩垣 (いわがき, 'stone wall') and 清水 (しみず, 'spring water'). The exact historical derivation is uncertain, but the term is descriptive of the phenomenon.