UNCOUPLE
uncouple, decouple
(verb) disconnect or separate; “uncouple the hounds”
Source: WordNet® 3.1
Etymology
Verb
uncouple (third-person singular simple present uncouples, present participle uncoupling, simple past and past participle uncoupled)
(transitive) To disconnect or detach one thing from another.
• We uncoupled the trailer and left it behind.
(transitive) To come loose.
(transitive) To loose, as dogs, from their couples.
Source: Wiktionary
Un*cou"ple, v. t. Etym: [1st pref. un- + couple.]
Definition: To loose, as dogs, from their couples; also, to set loose; to
disconnect; to disjoin; as, to uncouple railroad cars.
Un*cou"ple, v. i.
Definition: To roam at liberty. [Obs.] Chaucer.
Source: Webster’s Unabridged Dictionary 1913 Edition