An Etymological Dictionary of Astronomy and Astrophysics

To emit particles, sparks, etc., forcibly or explosively, especially accompanied by sputtering sounds.

Etymology (EN): Originally “to spit with explosive sounds,” cognate with Du. sputteren, W.Fris. sputterje.

Etymology (PE): Osparândan, literally “to throw out,” from os- “out,” → ex-, + parândan “to eject,” transitive verb of
paridan “to fly” (from Mid./Mod.Pers. par(r) “feather, wing,” Av. parəna- “feather, wing;” cp. Skt. parna “feather,” E. fern; PIE *porno- “feather”).