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DictionaryjarSudden shock
noun / verb

jar

A sudden disturbing shock.

The elevator stops with a jar that shakes us all.

Etymology
jarEnglisha harsh discordant sound

The shock sense developed from jarring sound or discord. The container-name has a separate history.

More examples

  • The sudden crash jars me awake.
  • Each pothole sends a painful jar through my back.
  • His cheerful tone jars with the somber mood.

Forms

jar · jars · jarred · jarring

jarring adjective — Causing an unpleasant shock or clash.

Similar words

jolt
Emphasizes a sharp physical movement rather than an unpleasant clash.
shock
Emphasizes emotional disturbance, not necessarily a physical shaking.
clash
Emphasizes incompatibility or conflict rather than a sudden shock.