Which word can also mean to invigorate or make lively?

The word "exhilarate" is synonymous with invigorating or making something lively. It is derived from the Latin root that means to "cheer up” or "make glad," conveying a sense of excitement and energy. When something is exhilarated, it feels more energetic, spirited, and vivacious, often reflecting an uplifted mood or enhanced vitality.

In contrast, the other choices do not convey this meaning. For instance, "devitalize" suggests a loss of energy or vitality, which is the opposite of invigorating. "Stagnate" indicates a lack of movement or growth, often leading to dullness or inactivity, rather than liveliness. "Retreat" typically refers to moving back or withdrawing, which does not imply enhancement or vivacity either.

Thus, "exhilarate" is the only word that correctly aligns with the idea of making something lively or invigorated.