nonmobile
Nonmobile is an adjective describing something that is not able to move or is fixed in place. The term is formed from the prefix non- plus mobile, but in everyday English it is uncommon and often replaced by immobile or stationary. When nonmobile is used, it can carry a sense of a deliberate or inherent lack of mobility rather than a temporary state of stillness.
In technology and computing, nonmobile is sometimes used to distinguish fixed infrastructure from portable devices. Examples
In other domains, nonmobile can describe organisms or systems that do not move. In biology, sessile organisms
Overall, nonmobile is a broad, technical-sounding synonym for stationary or immobile, but it is rarely the preferred