heated stone; hot stone
A stone that has been heated, often used for cooking, warming, or therapeutic purposes. Compare with 温石 (おんじゃく), a stone used specifically for warming the body.
See also: 温石
Cook by putting heated stones into the pot.
I received a massage using hot stones at the hot spring.
Standard spelling with okurigana.
Variant without okurigana; less common but still used.
Compound of 焼き (yaki, 'baking, grilling') + 石 (ishi, 'stone'). The exact historical derivation is uncertain, but the word straightforwardly describes a stone that has been heated.