The word "专心" is formed through a logical and pictorial combination of its two component characters. The first character, "专" (zhuān), carries the core meaning of focusing on one thing, being devoted or specialized. The second character, "心" (xīn), means heart or mind, representing the center of one's thoughts and emotions. When placed together, they create a direct conceptual compound: the state where one's heart-mind is singularly concentrated, visually and semantically conveying the idea of "concentrating" or "giving undivided attention".