breakup

(-up′)

noun

the act or an instance of breaking up; specif.,
  1. a dispersion
  2. a disintegration or decay
  3. a collapse
  4. a stopping or ending

See breakup in American Heritage Dictionary 4

noun
  1. The act or an instance of breaking up, as a division, dispersal, or disintegration.
  2. The discontinuance of a relationship, as a marriage or a friendship.
  3. The cracking and shifting of ice in rivers or harbors during the spring.
  4. A loss of control or composure.

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