rocky outcrop; jumble of rocks
Refers to a natural cluster or group of rocks, often in a landscape context. Can describe a rocky outcrop or a scattered jumble of rocks.
There was a large jumble of rocks on the shore.
登山道の途中で岩群を見つけた。
We found a rocky outcrop along the mountain trail.
Compound of 岩 (iwa, 'rock') and 群 (mura, 'group, cluster'). The reading いわむら follows standard kun'yomi for both kanji.