The phrase "gotten out from under" typically conveys a sense of escaping or being freed from a difficult situation, usually financial or legal in nature. Antonyms for this phrase would include "trapped," "ensnared," and "burdened." These words describe a person who is still struggling with a problem and has not yet found a way out. Other potential antonyms include "stuck," "stagnant," and "limited," which all imply an inability to move forward or make progress. Essentially, any word that embodies the opposite of release, freedom, or relief could be considered an antonym for "gotten out from under.