An Etymological Dictionary of Astronomy and Astrophysics

A defect or malfunction in a machine or plan.
A brief or sudden interruption or surge in voltage in an electric circuit.
A sudden change in the rotation period of a pulsar.

Etymology (EN): Glitch, from Yiddish glitsh “slippery area;” cf. glitshn, Ger. glitschen “to slip, slide.”

Etymology (PE): Geles, from Lori gelese “to fall down, to slide.”