To jounce is to move up and down suddenly, the way you jounce around in the back seat of your brother's old car as he drives along a rutted dirt road.

When you jounce, you bounce abruptly. You may love to jounce down a frozen hill on an old plastic sled, while your best friend prefers the relative comfort of a huge, inflatable tube. Jounce is also a noun: "That last jounce knocked my teeth together." This word is probably a combination of bounce and jump or jolt, and we've been using it since the mid-15th century.

Definitions of jounce
  1. verb
    move up and down repeatedly
    synonyms: bounce
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    type of:
    go, locomote, move, travel
    change location; move, travel, or proceed, also metaphorically
  2. noun
    a sudden jarring impact
    synonyms: jar, jolt, shock
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    type of:
    blow, bump
    an impact (as from a collision)
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