The antonyms of "more revitalizing" would be words that suggest a lack of energy, excitement, and freshness. Some possible antonyms could include "dull," "lifeless," "exhausted," "tired," and "drained." These words all suggest a situation or experience that is lacking in vitality, energy, and enthusiasm. On the other hand, words like "invigorating," "refreshing," "stimulating," and "reviving" would be antonyms that suggest an experience or situation that is full of energy, freshness, and excitement. The choice of antonym would depend on the context and the particular nuance of meaning that is being conveyed.