The word 真心 is formed by the direct conceptual combination of its two component characters: 真 (zhēn), meaning "true", "real", or "genuine", and 心 (xīn), meaning "heart", "mind", or "inner self". It is not merely an additive phrase but a fused compound where the first character 真 acts as a profound modifier of the second 心, creating a new, unified idea of an "authentic heart" or "true inner core". This formation visually and semantically presents the abstract notion of sincerity, earnestness, or heartfelt genuineness as something concrete, specifically, as the inherent quality or state of one's innermost being being true and without deception.