An Etymological Dictionary of Astronomy and Astrophysics

Having a fixed, unchanging position; motionless. geostationary orbit

Etymology (EN): M.E. from L. stationarius, in classical L., “of a military station,” from statio, → station.

Etymology (PE): Isatvar, from ist present stem of istâdan “to stand” (Mid.Pers. êstâtan; O.Pers./Av. sta- “to stand, stand still; set;” Av. hištaiti; cf. Skt. sthâ- “to stand;” Gk. histemi “put, place, weigh,” stasis “a standing still;” L. stare “to stand;” Lith. statau “place;” Goth. standan; PIE base *sta- “to stand”) + -var suffix of possession, variant
-ur (Mid.Pers. -uwar, -war;
from O.Pers. -bara, from bar- “to bear, carry”).