Antonyms for the word "energy giving" may vary depending on the context or the intended meaning. However, some general opposites of this term could be "energy draining," "exhausting," "tiring," "weakening," "enervating," or "debilitating." These terms imply the opposite effect of the word "energy giving," as they suggest a lack of vigor, vitality, or liveliness. Additionally, some terms that convey the opposite meaning of "energy giving" could be "boring," "dull," "monotonous," "uninspiring," or "unstimulating," as they indicate a lack of excitement or interest that would motivate someone to act with energy and enthusiasm.