* Enchanted or charmed: They are under the influence of magic or a powerful emotion.
* Beguiled or hypnotized: They are captivated by someone or something and may not be thinking clearly.
* Obsessed or infatuated: They are deeply focused on one person or thing, often to the exclusion of all else.
It's a versatile phrase that can be used in a variety of contexts.
Here are some examples of how it might be used:
* "She was under a spell, completely enthralled by his charm." (enchanted)
* "The hypnotist had them under a spell, making them believe they could fly." (hypnotized)
* "He was under a spell, convinced that she was the only woman for him." (obsessed)
Let me know if you have any other questions!