The word "alimentative" refers to something related to nourishment. Therefore, some antonyms for this word could be "malnourished," "starving," or "underfed." These terms describe situations where an individual is deprived of food, either by choice or because of external circumstances. On the other hand, antonyms for "alimentative" could also be those that describe the opposite of food or nourishment. Such words could include "toxic," "poisonous," or "harmful." These words denote something that is detrimental to an individual's health, instead of providing sustenance. By understanding the antonyms of "alimentative," one can understand the wide range of ideas that are related to this term.