en·fran·chise /in-'fran-ˌchīz/ vt -chised, -chis·ing: to grant franchise to; esp: to admit to the privileges of a citizen and esp. to voting rightsthe Twenty-sixth Amendment enfranchised all citizens over 18 years of age compare emancipate
Merriam-Webster’s Dictionary of Law. Merriam-Webster. 1996.
accipere, admit to citizenship, adsciscere, affranchise, allow, authorize, disenthrall, emancipate, empower, endow with political privilege, franchise, free, free from political disabilities, give liberty to, give political privileges to, give the right to vote, grant, liberate, license, manumit, permit, permit to vote, qualify, recipere, release, restore to liberty, sanction, set at liberty, set free
allow (authorize), authorize, bestow, disenthrall, free, let (permit), liberate, release
Burton's Legal Thesaurus. William C. Burton. 2006
v.To grant someone the right to vote.n.enfranchisement
The Essential Law Dictionary. — Sphinx Publishing, An imprint of Sourcebooks, Inc. Amy Hackney Blackwell. 2008.
v. To grant rights to an individual or group, such as a right to vote or to have personal freedom (for example, the Emancipation Proclamation enfranchised the slaves).
Webster's New World Law Dictionary. Susan Ellis Wild. 2000.