To release or set free from imprisonment; to liberate someone from prison.
From dis- (reversal) + imprison (to put in prison). Imprison comes from Old French emproisoner, combining en- (in) + prison (from Latin prisio, a seizure). This word essentially reverses the act of imprisoning.
While we now use 'release' or 'free,' disimprison is the semantic mirror of 'imprison'—it's satisfying proof that English speakers understood symmetry in word-building. Medieval and Renaissance legal documents actually used this word to formally describe freeing prisoners, giving it real power in courts of law.
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