The word "倦怠" is formed by combining the character "倦", meaning tired or weary, which uses the person radical "亻" alongside the component "卷" suggesting curling up from fatigue, with the character "怠", meaning idle or sluggish, which uses the heart radical "心" alongside the component "台" to imply a base state of mind; together, they create a compound where both characters contribute semantically to denote a state of burnout or lethargy integrating physical exhaustion and mental disengagement.