forwarn or forewarn /fər- or för-wörnˈ/

To forbid

• unluckily
• unluckiness
• unluckinesses
• unlucky
• unluxuriant
• unluxurious
• unmacadamised
• unmacadamized
• unmade
• unmade-up
• unmaidenly
• unmailable
• unmailed
• unmaimed
• unmaintainable
• unmaintained
• unmakable
• unmake
• unmakes
• unmaking
• unmakings
• unmalicious
• unmalleabilities
• unmalleability
• unmalleable