KanjiJLPT N4
Bad

bad, vice, rascal, false, evil, wrong

Mnemonic

Deep in asia, an ancient temple hides a cursed heart carved from obsidian. Priests sealed it away because whoever holds it becomes utterly bad—consumed by wickedness, cruelty pouring from their soul. The heart still beats, spreading its evil pulse across asia to this day.
Additional thoughts
Picture the continent of Asia with a massive dark heart buried at its center, radiating waves of evil. The heart under Asia equals badness—corruption rising from deep within.
Quick recall
A cursed heart buried beneath asia turns everyone near it bad.

Details

The keyword for 悪 is bad. This kanji represents the concept of badness, evil, or wickedness in a broad sense. It encompasses moral wrongdoing, poor quality, and general negativity. It can describe anything from a bad person or evil deed to something unpleasant, harmful, or inferior in nature.
On'yomi
あく、お
Kun'yomi
わる.い、わる-、あ.し、にく.い、-にく.い、ああ、いずくに、いずくんぞ、にく.む