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

• efforcing
• effort
• effortful
• effortfully
• effortless
• effortlessly
• effortlessness
• efforts
• effraide
• effray
• effronteries
• effrontery
• effulge
• effulged
• effulgence
• effulgences
• effulgent
• gruffly
• gruffness
• gruffnesses
• grufted
• gru-gru
• gru-gru worm
• gruing
• grum