KanjiJLPT N1
Fermentation

Mnemonic

You leave a bottle of wine on the family altar as an act of filial piety toward your late grandmother. Weeks pass. When you return, the wine has changed — bubbling, alive, transformed by fermentation. Grandma's spirit is still brewing things from the other side.
Additional thoughts
The altar setting naturally ties filial piety (honoring ancestors) to a bottle of wine left long enough to ferment. Imagine the bubbling sound and sour-sweet smell filling the shrine room.
Quick recall
A bottle of wine offered in filial piety at Grandma's altar undergoes fermentation from beyond.

Details

The keyword for 酵 is fermentation. This kanji refers to the biochemical process by which organic substances are broken down by the action of enzymes, bacteria, or yeast, producing changes such as the conversion of sugars into alcohol or acids. It is closely associated with the production of foods and beverages like sake, miso, soy sauce, and yogurt. The character captures the essential concept of controlled microbial transformation that has been central to food culture for millennia.
On'yomi
こう