The Chinese word **责任心 (zérèn xīn)**, meaning "sense of responsibility" or "conscientiousness," is a compound noun formed through semantic combination. It consists of the morpheme **责任 (zérèn)**, which means "responsibility" or "duty," and the morpheme **心 (xīn)**, which literally means "heart" but in this context metaphorically extends to "mind," "consciousness," or "inner quality." Therefore, the term is constructed logically to signify "the heart/mind for responsibility"—that is, the internal attitude, awareness, or conscientious feeling that motivates one to fulfill their duties and obligations. This structure is typical in Chinese, where 心 is often appended to nouns to form words describing psychological states or virtues.