The crossword solutions for the term 'run out of energy' are 'TIRE' and 'losesteam'. TIRE is a four-letter word that refers to the rubber covering on a wheel, which is used to provide traction and absorb shock. Losesteam is a nine-letter word that means to become exhausted or to run out of energy. Both words refer to the same concept of running out of energy, which can be caused by physical or mental exhaustion.