forwarn or forewarn /fər- or för-wörnˈ/

To forbid

• orecchiette
• orecrowe
• orecrowed
• orecrowes
• orecrowing
• orectic
• or e'er
• Oreg.
• oregano
• oreganos
• oreide
• oreides
• or else
• o're-office
• o're-officed
• o're-offices
• o're-officing
• oreographic
• oreographical
• oreographically
• oreographies
• oreography
• oreological
• oreologies
• oreologist