(Latin nodus, French naeud, Danish knude, Dutch knot, Anglo-Saxon cnotta, allied to knit.)
He has tied a knot with his tongue he cannot untie with his teeth.
He has got married. He has tied the marriage knot by saying, “I
take thee for my wedded wife,” etc., but the knot is not to be untied
The Gordian knot.
The marriage knot.
The ship went six or seven knots an hour. Miles. The
log-line is divided into lengths by knots, each length is the same
proportion of a nautical mile as half a minute is of an hour. The
log-line being east over, note is taken of the number of knots run out
in half a minute, and this number shows the rate per hour.
The length of a knot is 47'33 feet when used with a 28-second
glass, but 50'75 feet when the glass runs 30 seconds.
True lovers' knot.
Sir Thomas Browne thinks the knot owes its origin to the nodus
Herculanus, a snaky complication in the caduceus or rod of Mercury,
in which form the woollen girdle of the Greek brides was fastened.
To seek for a knot in a rush.
Seeking for something that does not exist. Not a very wise phrase,
seeing there are jointed rushes, probably not known when the
proverb was first current. The Juncus acutiflorus, the Juncus
lampocarpus, the Juncus obtusiflorus, and the Juncus
polycephalus, are all jointed rushes.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894