About
The character "虼" is structured as a phono-semantic compound with the semantic radical 虫, indicating its relation to insects, and the phonetic component 乞, which guides its pronunciation. It has historically been employed almost exclusively in the compound "虼蚤" to refer to fleas, a meaning that has persisted since the character's formation without substantial deviation. The character's etymology illustrates its development as a specific term for a particular insect, leveraging the radical for categorical clarity and the phonetic for auditory association.