backtracking

Noun

 * 1)  The act of one who, or that which, backtracks; a retracing of one's steps.
 * 2)  The usage of a runway as a taxiway, especially at private strips and smaller airports.
 * 3)  The act of building all possible solutions to a problem incrementally, abandoning any candidate solution if it cannot lead to a valid solution.

Translations

 * Esperanto: malavanco
 * Spanish: vuelta atrás