IPA: /ʌnˈtʃeɪn/
KK: /ʌnˈtʃeɪn/
To free someone or something from chains or restraints.
The kind man decided to unchain the dog that had been tied up for hours.
Past: unchained
Past Participle: unchained
Unchain → It is formed from "un-" (meaning not or opposite of) and "chain" (from Old French *chaîne*, meaning a series of linked metal rings). The word "unchain" means to remove the chains or to free from being chained.
Think of 'not' or 'opposite' ('un-') of being 'linked' ('chain') — that's why unchain means to free from chains.