deriv LSK ETT STT aSTA ALPH OLDHOMEPAGE NEWHOMEPAGE
This "Ge" is the singular /sup ending of the fourth line, /GebhyAmbhyas.
vidyut- विद्युत् + /Ge → !**vidyute विद्युते "to lightning"
as in
vidyute namaH विद्युते नमः "salutation to lightning"
After a अ-enders, /Ge turns into ya य —
**ziva- शिवॱ + /Ge
→ ziva- शिवॱ + ya य by GeryaH
→ zivA- शिवाॱ + ya य by supica
→ !**zivAya शिवाय
as in
on namaz zivAya ओं नमः शिवाय "homage to Shiva"