Simple: The elusive thief managed to escape capture again.
Figurative: The meaning of the ancient text remained elusive, despite the scholars' best efforts.
Descriptive: The scent of fresh-baked bread was both inviting and elusive, teasing my senses.
Formal: Finding a definitive solution to the problem proved elusive, requiring further investigation.
Informal: That perfect job I've been searching for seems just as elusive as a unicorn.
With a Noun Phrase: The elusive peace of mind was finally within her grasp.
With a Verb: The truth about the incident continued to elude us.
In a Comparative: The elusive nature of true happiness made it all the more desirable.
In a Negative Sentence: The answer was not elusive, but rather readily available online.