crash dive

Noun

 * 1)  An emergency maneuver by a submarine in which it suddenly descends, especially to considerable depth, usually in order to escape an attack or avoid a collision.
 * 2) A rapid descent by a person or thing, ending in a violent collision.
 * 3)  Three quarters of a front somersault, beginning on the feet and landing on the back.
 * 1)  Three quarters of a front somersault, beginning on the feet and landing on the back.
 * 1)  Three quarters of a front somersault, beginning on the feet and landing on the back.

Verb

 * 1)  To perform a crash dive.
 * 2)  To cause (a submarine) to perform a crash dive.
 * 3) * 2014, Philip Kaplan, Grey Wolves: The U-Boat War, ISBN 9781629140766, "Sit There and Take It" (Google online preview):
 * Siegmann was still obliged to crash-dive the sub three more times to escape twelve more bombs.
 * 1)  To rapidly descend, intentionally or accidentally, in a manner that ends in a violent collision.
 * 2)  To rapidly descend, in a manner that ends in a violent collision with (something).
 * 3)  To cause (something) to descend rapidly, in a manner that ends in a violent collision.
 * 1)  To rapidly descend, in a manner that ends in a violent collision with (something).
 * 2)  To cause (something) to descend rapidly, in a manner that ends in a violent collision.
 * 1)  To cause (something) to descend rapidly, in a manner that ends in a violent collision.