The document defines and provides examples for several terms: a coil is something wound in a circular shape like rope on a boat's anchor; a descent is coming down from a higher to lower place like an actress' staircase pose; foresaw means saw or knew beforehand as a President foresaw war; to rappel is to lower oneself down a cliff face using a rope; a ridge is the narrow upper part of a hill or mountain from which you can see far; a shaft is the main part of a column or narrow space like a mine; trekked is the past tense of trek meaning to travel slowly like a caravan across desert; a void is an empty space like outer space.