The antonyms for the phrase "take task" vary depending on the exact meaning of the word "task". If we interpret it as a command or a duty, an antonym would be to refuse or decline the task. Alternatively, if we take "task" to mean a mission, action, or responsibility, the opposites may include to abandon, to escape, to neglect, or to avoid. Another antonym for "take task" could be to delegate, which means to assign the responsibility to someone else. In any case, the choice of antonym depends on the context and the intended meaning of the phrase.