The word 忠实 is formed through the conceptual fusion of two distinct ideas: 忠 (zhōng), which carries the core meaning of unwavering loyalty and devoted faithfulness, often with a moral or heartfelt connotation, and 实 (shí), which embodies the qualities of solidity, truthfulness, and substantial reality. Together, they do not merely list traits but interact to create a single, enriched concept, a loyalty that is not just professed but is solid, genuine, and dependable in substance, like a truth that is faithfully upheld. The formation is essentially a marriage of an internal virtue (忠) with an external, manifest quality (实), yielding the complete notion of "faithful" or "loyal" in the deepest and most trustworthy sense.