Keel
WordNet
noun
(1) One of the main longitudinal beams (or plates) of the hull of a vessel; can extend vertically into the water to provide lateral stability
(2) The median ridge on the breastbone of birds that fly
verb
(3) Walk as if unable to control one's movements
"The drunken man staggered into the room"
WiktionaryText
Noun
- A large beam along the underside of a ship’s hull from bow to stern.
- Sometimes, a rigid, flat piece of material anchored to the lowest part of the hull of a ship to give it greater control and stability.
- Something similar to chalk or crayon used to mark pavement.
Verb
- to collapse, to fall
- He keeled over after having a stroke.