About
The character 痼 is structured with the sickness radical 疒 combined with the component 固, which serves as both a phonetic indicator and a semantic contributor conveying firmness or chronicity, thereby defining the term as a persistent, hard-to-cure disease. Its etymology directly associates the notion of a solid, entrenched condition with illness, and over time the meaning expanded from solely describing physical ailments to also encompassing metaphorical applications such as ingrained habits or stubborn problems. The character's form has consistently utilized these components without alteration, reflecting its original construction in modern usage.