The word 心烦 is formed by directly combining two characters to create a vivid, felt concept: 心 (xīn), meaning "heart" or "mind", and 烦 (fán), meaning "annoyed", "troubled", or "in a state of bother". It visually and conceptually places the feeling of agitation and irritation squarely within the center of one's being, suggesting a state where the heart-mind itself is restless, besieged, or overheated by worries, creating a single composite idea of emotional and mental unease.