I didn't think Heron was the man to keel over in a faint, even for a thing like that.
Then one could go out into the midst of the people and keel over a world.
"Say, if you're a-goin' to keel over like thet I pass," declared Ruff, in disgust.
Yes, and I saw that he was about to keel over, interrupted Mr. Swaim.
That fool of a country doctor tells me if I'm not careful what I eat I'll keel over pretty soon.
I feel it in my bones, and I don't give a damn when I keel over.
Not long afterward I saw her keel over, break in two and disappear.
Daren, if you did keel over—you'd die in my arms—not on the floor!
"Funny I had to keel over like that," he said grinning feebly.
The result to the ram was that a hole was torn in her hull which caused her to keel over and sink.
"lowest timber of a ship or boat," mid-14c., probably from a Scandinavian source, cf. Old Norse kjölr "keel," Danish kjøl, Swedish köl, from Proto-Germanic *keluz, of uncertain origin. Some etymologists say this is unconnected with the keel that means "a ship, barge," which also is the root of Middle Dutch kiel "ship," Old English ceol "ship's prow," Old High German kiel, German Kiel "ship," but the two words have influenced each other. Barnhart, however, calls them cognates. This other word is said to be from Proto-Germanic *keula, from PIE *geul- "rounded vessel." Keel still is used locally in England and U.S. for "flat-bottomed boat," especially on the Tyne.
1838, American English, from keel (n.). To keel over (1876) is from the nautical image of a ship turning keel-up. Related: Keeled; keeling.
"to keep cool," from Middle English kelen, from Old English celan "to cool," from col "cool" (see cool). The form kele (from Old English colian) was used by Shakespeare, but it later was assimilated with the adjective form into the modern verb cool. Cognate with Dutch koelen, Old High German chuolen, German kühlen.
To fall down; collapse: He was so tired he was about to keel over
[1876+; fr nautical careening of a ship so that the keel is raised]