The phrase "more energygiving" implies something that increases energy, vitality, and enthusiasm. However, if we are looking for antonyms, we must consider the opposite. Hence, some phrases that can be considered antonyms for "more energygiving" are: "draining," "exhausting," "tiring," and "weakening." These words indicate something that drains one's energy levels and reduces enthusiasm. Foods that are high in fat and sugar content can be energygiving, while processed and junk food can be draining. Similarly, taking short and frequent breaks can boost energy levels, while overworking and lack of rest can be exhausting. In short, the antonyms of "more energygiving" are those that reduce or drain energy levels.