KanjiJLPT N3
Stone

Mnemonic

You snap a twig off a tree and pop it into your mouth to chew. But it's impossibly hard—you crack a tooth! You spit it out and discover it's actually a tiny stone perfectly carved to look like a twig. Someone left that stone decoy on the branch as a prank.
Additional thoughts
Picture the shocking moment of biting down on solid rock disguised as a stick. The pain in your mouth makes the image unforgettable. Twig on top, mouth below—just like the kanji structure.
Quick recall
A twig in your mouth turns out to be a stone decoy.

Details

The keyword for 石 is stone. This kanji represents a naturally occurring solid mineral material found in the earth. It encompasses rocks, pebbles, and stones of all sizes, and by extension can refer to things that are hard, rigid, or unyielding like stone. In traditional Japanese measurement, it also served as a unit of volume, particularly for rice.
On'yomi
せき、しゃく、こく
Kun'yomi
いし