immotile

From im- +‎ motile.

immotile (comparative more immotile, superlative most immotile)

1. Not motile (lacking the ability to move)

   Synonyms: static, unmovable; see also Thesaurus:immobile

   • 2007, Peter F. Hamilton, The Dreaming Void:

     And they currently have forty-two ships searching for an immotile civilization beyond the region of space we Firewalled.

• immotility