one's mind; inner feelings; the bottom of one's heart
Refers to one's true inner thoughts and feelings, often contrasted with outward expression. Used in formal or literary contexts.
From his words, I could sense the pain hidden deep in his heart.
It is not easy to reveal one's innermost feelings.
内心 is a common word for 'inner thoughts' or 'inwardly', often used in everyday speech. 心裡 is more formal and less frequent.
mental reservation; false declaration of intent
Standard kanji form. 裡 is the traditional form of 裏.
Variant using the simplified kanji 裏. Both forms are used.
Compound of 心 (heart, mind) and 裡/裏 (inside, back). The exact historical derivation is uncertain, but the combination naturally conveys the idea of the inner recesses of the mind.