De trains is a French phrase that means to disembark or get off a train. The antonyms for de trains would be en trains, meaning to board or get on a train. Other antonyms could include staying on the train, continuing the journey, or delaying disembarkation. De trains can also imply leaving or exiting a situation or place, so antonyms could also include entering or arriving at a new location, staying longer or becoming more involved, or choosing to remain in the current situation. The use of antonyms can help to expand vocabulary, improve communication skills, and promote nuanced understanding of language.