An Etymological Dictionary of Astronomy and Astrophysics

Electricity: A sudden rush or burst of current or voltage.
Sun: A jet of material from an active region that reaches coronal heights
and then either fades or returns into the chromosphere along the trajectory of ascent.

Etymology (EN): From M.Fr. sourgir “to rise, swell,” from L. surgere “to rise, spring out” from → sub- “up from below” + regere “to keep straight, guide,” cognate with Pers. râst, → right.

Etymology (PE): Boruntâz, from borun “out, the outside,” → out, + tâz present stem of tâxtan, tâzidan “to run; to hasten; to assault”
(Mid.Pers. tak “assault, attack;” Av. taka- “leap, run,” from tak- “to run, flow;” cf. Skt. tak- “to rush, to hurry,” takti “runs;” O.Ir. tech- “to flow;” Lith. teketi “to walk, to flow;” O.C.S. tešti “to walk, to hurry;” Tokharian B cake “river;” PIE base *tek^w- “to run; to flow”).