石せっ塊かいせっかいMeanings1nounstone; pebbleGeneral term for a small to medium-sized stone or pebble. Not typically used for large rocks or boulders.道みちに石せっ塊かいが落おちていた。A stone was lying on the road.子こ供どもが石せっ塊かいを拾ひろってきた。The child picked up a pebble.