The word **尖锐 (jiānruì)** is formed through the combination of two synonymous characters, each contributing to an intensified and nuanced meaning. The first character, **尖 (jiān)**, primarily denotes a literal, physical sharpness or pointedness (like a needle). The second character, **锐 (ruì)**, carries the meaning of sharpness, but with a stronger connotation of keenness, acuity, or penetration, often used in both physical and abstract senses. When compounded, they create a word that powerfully conveys the idea of sharpness, extending from literal points to metaphorical descriptions of intense criticism, acute perception, or piercing sounds, thus blending the tangible quality of "尖" with the penetrating force of "锐."