The phrase "take wind out of sails" refers to someone or something that has diminished the enthusiasm or confidence of another. Some antonyms for this phrase could be inspirational, motive, encourage, and energize. These words have the opposite effect of deflating or demotivating, as they help to uplift and propel individuals towards reaching their goals. Other antonyms might include boosting, cultivating, invigorating, and fostering. Each of these words suggests a positive, forward-looking mindset that can help individuals stay focused and motivated, even in the face of setbacks or challenges. By using these antonyms, we can help others to stay motivated and achieve their dreams.