Hammer home
Definition 1 of 1
Pro Tip 1/3Persistence
This phrase implies repetitive emphasis over time, not just once. 
During the meeting, she continued to hammer home the importance of customer satisfaction.
Pro Tip 2/3Intensity
The phrase suggests a strong, almost forceful, determination to make a point clear. 
He hammered home the need for safety protocols at the construction site.
Pro Tip 3/3Convincing
Used when trying to persuade others or convince them of your position. 
The lawyer hammered home each evidence to prove his client's innocence.