甃

The interior masonry (brick or tile) of a well shaft.

Used as a noun referring to the physical lining, or as a verb meaning to construct the masonry of a well.

Unlike 砌 (qì), which refers to general masonry and the laying of bricks or stones, 甃 is restricted specifically to the well-shaft. The term denotes permanent, fired-brick construction, distinguishing it from wells lined with wood, bamboo, or raw earth.

The brick/tile radical (𤽀) is diagnostic of the material used in the construction.

Determine whether the context refers to the finished object or the act of construction. In poetic contexts, the glyph may be used to emphasize verticality and containment through its material composition.