An Etymological Dictionary of Astronomy and Astrophysics

A sharp change in the properties of a gas (density, pressure, temperature).

Etymology (EN): Shock “sudden blow,” from M.Fr. choc “violent attack,” from O.Fr. choquer “to strike against, clash;” cf. Du. schokken “to shake, jolt, jerk.”

Etymology (PE): Toš, from Tabari toš “violent blow,” batoštən “to strike suddenly,” Kurd. tuš “collision,” maybe related to Pers. tuš “strength, vigor;” Av. təviši- “strength,” tavah- “power;” O.Pers. tauman- “power, strength,” tunuvant- “powerful,” from tav- “to have power, to be strong, to be able” (related to tavân “power, strength,” tavânestan “to be powerful, able;” variants tâv, tâb “power”); cf.
Skt. tu- “to be strong, to have authority,” tavas-, tavisa- “strong, energetic,” tavisi- “power, strength.”
Šok, loan from Fr., as above.