Hitting the horn is a common way to alert other drivers on the road. The term 'hit the horn' can be broken down into four different words: 'TOOT', 'HONK', 'BEEP', and 'TOOTLE'. 'TOOT' is a four letter word that means to make a short, sharp sound with a horn or whistle. 'HONK' is also a four letter word that means to make a loud, harsh sound with a horn. 'BEEP' is a six letter word that means to make a short, high-pitched sound with a horn. Lastly, 'TOOTLE' is a seven letter word that means to make a light, cheerful sound with a horn.