丸まる石いし

noun

boulder; cobble; round stone

A naturally rounded stone, often found in rivers or used for decoration. Can refer to stones of various sizes, from small cobbles to large boulders.

• 川原かわらで大おおきな丸まる石いしを見みつけた。

  I found a large round stone on the riverbank.

• 庭にわに丸まる石いしを敷しき詰つめて小こ道みちを作つくった。

  I laid round stones in the garden to make a path.