uncouple
verb /ˌʌnˈkʌpl/
  /ˌʌnˈkʌpl/
 Verb Forms
| present simple I / you / we / they uncouple |    /ˌʌnˈkʌpl/   /ˌʌnˈkʌpl/  | 
| he / she / it uncouples |    /ˌʌnˈkʌplz/   /ˌʌnˈkʌplz/  | 
| past simple uncoupled |    /ˌʌnˈkʌpld/   /ˌʌnˈkʌpld/  | 
| past participle uncoupled |    /ˌʌnˈkʌpld/   /ˌʌnˈkʌpld/  | 
| -ing form uncoupling |    /ˌʌnˈkʌplɪŋ/   /ˌʌnˈkʌplɪŋ/  | 
- uncouple something (from something) to remove the connection between two vehicles, two parts of a train, etc.
- To uncouple the trailer from the car, press the ‘release’ button and lift.