Synonyms of 'unleash'
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They are going to free more prisoners.
If you untie something that is tied to another thing or if you untie two things that are tied together, you remove the string or rope that holds them or that has been tied round them.
Nicholas untied the boat from her mooring.
Thesaurus for unleash from the Collins English Thesaurus
If you say that someone or something unleashes a powerful force, feeling, activity, or group, you mean that they suddenly start it or send it somewhere .