From Middle English forbarren (“to bar, bar up, block”), equivalent to for- + bar. Compare Middle High German verbarren (“to forbar”).
forbar (third-person singular simple present forbars, present participle forbarring, simple past and past participle forbarred)
- (obsolete, transitive) To bar in; to shut up.
- (obsolete, transitive) To bar, fend off, ward off.
- (obsolete, transitive) To exclude, deny.