The word "most nurtured" implies a high level of care and attention given to something or someone. Some possible antonyms for this phrase might include "neglected," "ignored," "abandoned," or "undeveloped." These words suggest a lack of cultivation or support, indicating that the object in question has not been given the resources or attention it needs to thrive. Other potential antonyms might include "unloved," "stifled," or "stunted," all of which convey a sense of suffocation or limitation that prevents growth or progress. Overall, the antonyms for "most nurtured" suggest a situation in which something or someone has been left to languish, rather than encouraged to flourish.