mobile

From Middle English, from Old French, from Latin mōbilis (“easy to be moved, moveable”), from moveō (“move”). The video-gaming sense was coined by Richard Bartle to describe NPCs or creatures capable of moving "under their own power" in the 1978 video game Multi-User Dungeon. Bartle retracted an earlier claim of his that it was from the kinetic sculpture sense of mobile (for the "unpredictable but limited" motion of the hanging ornaments).