About
The character "窬" is structured with the semantic component "穴", indicating a hole or cavity, and the phonetic component "俞", which guides its pronunciation. Initially, this character denoted a small door or an aperture in a wall, specifically one used for passage. Over time, its meaning expanded to include the act of piercing through or creating an opening, and it also acquired connotations of a covert or illicit passageway, reflecting applied uses derived from its core sense of a penetrable gap. While its form has remained consistent in composition, the character's application has narrowed, now primarily encountered in classical texts or specialized references rather than in common modern vocabulary.
Etymology Hide
