uncoupling

/AH0 N K AH1 P L IH0 NG/
verb
  1. 1

    To disconnect or detach one thing from another.

    โ€œWe uncoupled the trailer and left it behind.โ€

  2. 2

    To come loose.

  3. 3

    To loose, as dogs, from their couples.

noun
  1. 1

    The act by which persons or things are uncoupled.

Source: https://en.wiktionary.org/wiki/uncouple, https://en.wiktionary.org/wiki/uncoupling