U+1D9BA "𝦺" Signwriting Movement-Floorplane Hump Hitting Ceiling Large Double Unicode Character

U+1D9BA "𝦺" Signwriting Movement-Floorplane Hump Hitting Ceiling Large Double is a specialized symbol within the SignWriting script, a writing system designed to visually represent sign languages. This specific symbol depicts a large, double-sized hump shape that moves upward from a floor plane reference to make contact with a ceiling plane, indicating a distinct two-handed or repeated motion path in signed communication. It belongs to the SignWriting movement notation module, used to convey the spatial dynamics and surface interactions of handshapes within a signed phrase, such as a hand rising to tap or press against an upper boundary.