ノット

Etymology 1
Borrowed from.

Noun

 * 1)  a knot: a nautical unit of speed, one nautical mile per hour
 * 2)  knot in a rope or necktie

Usage notes
For the speed-related sense, the katakana spelling is more common in modern Japanese than either kanji spelling of  or.

Etymology 2
Borrowed from.

Noun

 * 1)  NOT