uncouple

UK: /ʌnˈkʌp^əl/ US: /ʌnˈkʌpəl/ ,(un kup′əl)

Inflections of 'uncouple' (v): (⇒ conjugate)

uncouples

v 3rd person singular

uncoupling

v pres p

uncoupled

v past

uncoupled

v past p

WordReference Random House Learner's Dictionary of American English © 2025

un•cou•ple /ʌnˈkʌpəl/   v., -pled, -pling. 

1. to disconnect: [no object]
   The train cars uncoupled automatically.
   [~ + object]
   The train crew uncoupled the boxcar.

WordReference Random House Unabridged Dictionary of American English © 2025

un•cou•ple  (un kup′əl), v., -pled, -pling. 
v.t. 

1. to release the coupling or link between;
   disconnect;
   let go:
   to uncouple railroad cars.

v.i. 

2. to become unfastened;
   let go:
   The glider uncoupled from the tow plane.

• 1300–50; Middle English unco(u)plen; see un-², couple

Collins Concise English Dictionary © HarperCollins Publishers::

uncouple / ʌnˈkʌp^əl/ verb

1. to disconnect or unfasten or become disconnected or unfastened
2. (transitive) to set loose; release