KanjiJLPT N1
Loyalty

loyalty, fidelity, faithfulness

Mnemonic

Look inside a samurai's heart and you'll find a single word etched in burning letters: Loyalty. It isn't performed or pretended—it radiates from the very center of his being, inseparable from who he is.
Additional thoughts
The kanji literally stacks 'inside/middle' (中) on top of 'heart' (心). Loyalty is what lives inside the heart—the deepest, most central feeling one can hold. Picture cracking open a chest to reveal glowing kanji at the core.
Quick recall
True loyalty is the word etched inside every devoted heart.

Details

The keyword for 忠 is loyalty. This kanji represents the concept of faithful devotion and wholehearted allegiance to a person, cause, or duty. It conveys the idea of sincerity and dedication that comes from the very center of one's being, suggesting a deep, unwavering commitment. In traditional East Asian culture, loyalty was considered one of the highest virtues, particularly in the context of serving one's lord or country.
On'yomi
ちゅう