The term "black hole" can be a bit misleading because black holes are not literal holes in the conventional sense. The name was coined due to their unique properties that can be metaphorically associated with a hole. Here's an explanation:
Gravitational pull: Black holes are incredibly massive objects that exhibit a gravitational pull so strong that nothing, not even light, can escape from their vicinity. This intense gravitational force acts as if it were pulling objects into a seemingly bottomless hole. Hence, the term "hole" is used metaphorically to describe the gravitational effect.
Event horizon: Black holes have a region called the event horizon, which is the boundary beyond which nothing can escape. It is often depicted as a boundary or surface surrounding the black hole. Once an object crosses this boundary, it is effectively trapped within the black hole, unable to return or be observed from the outside.
Lack of visible light: Black holes do not emit or reflect light, making them appear black in space. The absence of any detectable radiation from within the black hole contributes to the perception of a "black" region in space.
So, while black holes are not literal holes, the term "black hole" has become widely accepted and is used to describe these objects due to their characteristics, such as their strong gravitational pull, the concept of an event horizon, and their lack of visible light emission.