unbar

From Middle English unbarren, equivalent to un- +‎ bar.

unbar (third-person singular simple present unbars, present participle unbarring, simple past and past participle unbarred)

1. (transitive) To remove an impediment that obstructs the passage of (someone or something).
2. (transitive) To remove a prohibition.
3. (transitive) To unlock or unbolt a door that had been locked or bolted with a bar.

• Buran, Rabun, Urban, aburn, unabr., urban