The kanji 酵 primarily conveys the concept of fermentation or leavening, which is a process where a substance undergoes a chemical change brought about by the action of enzymes, usually from microorganisms like yeast or bacteria. This process is crucial in making foods like bread, beer, and yogurt. The character suggests the active transformation and the result of this transformation.

・On-yomi (音読み): コウ (kō) ・Kun-yomi (訓読み): None, as the meaning is primarily captured in compound words.

⚫︎発酵 (hakko) Translation: Fermentation ⚫︎酵母 (kōbo) Translation: Yeast ⚫︎酵母パン (kōbo pan) Translation: Yeast bread

The kanji 酵 is a phono-semantic compound (形声文字, keisei moji). The left side is radical 酉 (とり, tori), meaning "alcohol" or "wine" or "sake". The right side is 孝 (kou), which suggests sound. So the original meaning is related to the making of alcohol from the fermentation of grains or other materials. Over time, the meaning broadened to encompass fermentation in general, not just the fermentation process involved in making alcohol.