hammer

/ˈhæm·ər/ v [I/T]

Definition

› to hit something repeatedly with, or as if with, a hammer: [T] I hammered the nail into the wall. › To hammer is also to repeat again and again esp. to persuade other people about something: [I always + adv/prep] Martin Luther King, Jr., hammered at the theme that the civil rights movement must avoid violence. [I always + adv/prep] His attorneys hammered away at the idea that the police department was incompetent.

(Definition of hammer v from the Cambridge Academic Content Dictionary © Cambridge University Press)