Antonyms for the phrase "dedicate oneself to" would include terms such as neglect, abandon, ignore, disregard, or reject. These words imply a lack of commitment, attention, and effort towards a specific task, goal or project. Neglecting something means to pay little or no attention to it, while abandoning or rejecting it suggests a conscious decision to give up or refuse to pursue it. Ignoring and disregarding both imply a lack of interest, value or relevance placed on the subject. Therefore, the antonyms for "dedicate oneself to" are all negative actions that describe a lack of dedication, devotion or commitment towards a particular objective.