Trace
Part of speech: verb
Definition: To follow the trail of. To draw or sketch. To copy onto a sheet of transparent paper.
Part of speech: noun
Definition: An act of tracing. A mark left as a sign of passage of a person or animal. A very small amount. An electric current-carrying conductive pathway on a printed circuit board. An informal road or prominent path in an arid area. The sum of the diagonal elements of a square matrix.
Example sentence: Without a trace of irony I can say I have been blessed with brilliant enemies. I owe them a great debt, because they redoubled my energies and drove me in new directions.
Retrace
Part of speech: verb
Definition: To trace again; to go back over something, usually in an attempt of rediscovery.
Part of speech: noun
Definition: The period when the beam of the cathode-ray tube returns to its initial horizontal position in order to start the next line of the display.