KanjiJLPT N1
Inmost

inmost, heart, mind, inside

Mnemonic

Your garment has a secret pocket sewn over your heart. Buried inside it, a tiny mouth murmurs your inmost feelings — truths you never speak aloud. Press the garment to your ear and the mouth whispers the raw, sincere emotions hidden at your very core.
Additional thoughts
Visually, the kanji splits the garment radical (衣) around the mouth radical (口), literally placing the mouth INSIDE the garment — a perfect image of innermost feelings wrapped up and hidden from the world.
Quick recall
A mouth hidden inside a garment whispers your inmost feelings.

Details

The keyword for 衷 is inmost. This kanji refers to one's innermost feelings, the deepest and most sincere emotions held within the heart. It conveys the idea of what lies at the very core of a person's thoughts and sentiments, often used in the context of expressing one's true, heartfelt intentions. It carries a sense of sincerity and genuineness that comes from deep within.
On'yomi
ちゅう