forwarn or forewarn /fər- or för-wörnˈ/

To forbid

• automaton
• automatons
• automats
• automobile
• automobiles
• automobilia
• automobilism
• automobilisms
• automobilist
• automobilists
• automorphic
• automorphically
• automorphism
• automorphisms
• automotive
• autonomic
• autonomical
• autonomically
• autonomic nervous system
• autonomics
• autonomies
• autonomist
• autonomists
• autonomous
• autonomously