klaxon or Klaxon /klakˈsən/

1. Orig a mechanical horn with a loud rasping sound, of a kind used on early motor vehicles
2. Any electric horn

To sound a klaxon

• undervoices
• under water
• underwater
• underwaters
• under way
• underway
• underwear
• underwears
• underweight
• underweights
• underwent
• underwhelm
• underwhelmed
• underwhelming
• underwhelms
• underwing
• underwings
• underwire
• underwired
• underwires
• underwiring
• underwirings
• underwit
• underwits
• underwood