Which word best means to fill someone with sublime emotion?

The word "exhilarate" best means to fill someone with sublime emotion because it specifically conveys the idea of causing someone to feel very happy, lively, and elated. When someone is exhilarated, they experience an uplifting or thrilling emotion that can be described as sublime, which denotes something of great beauty or excellence that inspires awe.

In contrast, "overwhelm" can suggest an abundance of emotion or sensations, but it generally does not imply the positive, uplifting excitement implied by "exhilarate." "Frustrate" indicates a feeling of disappointment or annoyance, which is contrary to the idea of uplifting emotions. Similarly, "demoralize" refers to causing a loss of confidence or hope, which is again opposite to the joyful and sublime emotion that "exhilarate" suggests. Therefore, "exhilarate" is the most fitting choice in capturing the essence of filling someone with sublime emotion.