Left dust is an idiomatic expression that means abandoning someone or something. Antonyms for this phrase include staying loyal, supporting actively, nurturing, and encouraging. When you stay loyal, you stand by someone even in difficult situations. It means, you would never abandon or neglect them when they need you the most. To support actively is to be involved in the growth and development of something or someone, providing resources, and lending a helping hand. Nurturing means cultivating, protecting, and fostering growth, whether it's a person or something they have created. Encouraging someone, means giving them hope, inspiration, or motivation to keep moving forward. All of these words are antonyms for the negative connotations of the phrase Left dust.