A hatchway is an opening you pass through, most often in the floor of a ship (the deck), and sometimes in the floor, ceiling, or roof of a building. Picture a hole with a cover: the cover is the hatch; the hatchway is the opening and the short way down or through. Sailors go down a hatchway to rooms below. People often just say hatch for the same hole, so the two words sit very close in real talk. You will meet this more in ship stories, old warehouses, and safety signs than in everyday city chat. It is a physical doorway-hole — not the verb hatch, when a chick comes out of an egg, even though the first part looks the same.

艙口（甲板上通往下面的開口；蓋子叫 hatch）