forwarn or forewarn /fər- or för-wörnˈ/

To forbid

• polystyrenes
• polysulphide
• polysyllabic
• polysyllabical
• polysyllabically
• polysyllabicism
• polysyllabism
• polysyllabisms
• polysyllable
• polysyllables
• polysyllogism
• polysyllogisms
• polysyndeton
• polysyndetons
• polysyntheses
• polysynthesis
• polysynthetic
• polysynthetical
• polysynthetically
• polysyntheticism
• polysynthetism
• polysynthetisms
• polytechnic
• polytechnical
• polytechnics