Drive something home - Idioms by The Free Dictionary
drive something home
drive something home make something clearly and fully understood by the use of repeated or forcefully direct arguments.
The verbs hammer , press , and ram are also used in place of drive .
drive/hammer something ˈhome (to somebody) make sure that somebody understands something completely, for example by repeating it often: The instructor tried to drive home to us the need for safety precautions before diving. ♢ Police used statistics to hammer home their warning about car theft.