elusive

US /ɪˈlusɪv/

UK /iˈlu:sɪv/

B2
adj.AdjectiveDifficult to find or catch
The men are looking everywhere for the elusive animal
adj.AdjectiveDifficult to understand or define
The solution to the math problem was very elusive
adj.AdjectiveDifficult to find, catch, or achieve.
The cause of the disease remained elusive.
adj.AdjectiveDifficult to remember or recall.
The details of the dream were elusive.

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