To release or free someone from arrest; to free from restraint or confinement.
From dis- (meaning to reverse or undo) + arrest (from Old French arester, meaning to stop or detain). This is a rare legal or archaic term meaning to undo an arrest.
This word is almost extinct in modern English because we use 'release' instead, but legal documents from the 1700s-1800s used 'disarrest' as the formal opposite of 'arrest,' showing how vocabulary changes over centuries.
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