English Language · Vocabulary Usage

In how many of the given sentences has the underlined word 'enervate' been used correctly? S1: The coach's halftime speech was so powerful that it served to enervate the exhausted players for the final quarter. S2: We need to enervate the house by installing solar panels and better insulation to save on bills. S3: The scientist discovered a way to enervate the engine, increasing its horsepower by nearly twenty percent.