The word 伤感 is formed by combining two characters, each contributing a core concept to create a new, unified meaning. The first character, 伤 (shāng), carries the essence of a "wound", "injury", or "hurt". The second, 感 (gǎn), represents "feeling" or "sensation". They are fused not merely as separate ideas, but poetically, where the concrete image of a wound is directly transferred onto the realm of emotion. Thus, the compound evokes the specific feeling of being emotionally hurt or wounded, a sentimental sadness, a poignant sense of loss, or a melancholy ache, as if sadness itself is an injury felt by the heart.