Scut·tle n.
1. A small opening in an outside wall or covering, furnished with a lid. Specifically: (a) Naut. A small opening or hatchway in the deck of a ship, large enough to admit a man, and with a lid for covering it, also, a like hole in the side or bottom of a ship. (b) An opening in the roof of a house, with a lid.
2. The lid or door which covers or closes an opening in a roof, wall, or the like.
Scuttle butt, or Scuttle cask Naut., a butt or cask with a large hole in it, used to contain the fresh water for daily use in a ship.